Parent IEP Roadmap — Educational Advocacy Resource
IDEA Disability Classifications
Diagnostic Composition & Recommended Testing
A parent-focused reference guide to all 13 federal disability categories under IDEA — what each includes diagnostically, which assessments may be appropriate, red flags to watch for, and sample language for requesting evaluations.
How to Use This Guide
🌎 Nationwide Resource: This guide covers federal special education law as it applies across all 50 states. Where state laws vary or use different terminology, those differences are clearly labeled.
This resource is designed to help parents understand what each IDEA disability classification typically involves diagnostically, what types of assessments may be relevant, and what concerns may warrant requesting a formal evaluation. It is organized around the 13 federal disability categories recognized under the Individuals with Disabilities Education Act (IDEA). These 13 categories are defined in federal law (34 CFR §300.8) and apply in all 50 states.
⚖️ Federal Requirement (All States): The 13 IDEA disability categories are set by federal law and must be recognized by every state. States may use different terminology in their own regulations, but the categories themselves are federally defined and cannot be eliminated by a state. This guide covers how federal law applies nationwide.
📍 New York State: In New York, the Part 200 Regulations govern special education eligibility. NY may use different terminology for some categories (e.g., "Learning Disability" instead of "Specific Learning Disability"). Where NY-specific terminology or rules apply, they are clearly labeled in this guide.
Each section includes: the diagnostic composition of the category, commonly recommended assessments, observable red flags, and sample language parents may wish to adapt when requesting an initial or supplemental evaluation. This information is provided for educational and informational purposes only. Diagnostic determination is made by qualified professionals; eligibility determination is made by the IEP Team (called the Committee on Special Education, or CSE, in New York State). Parents may wish to consult a qualified special education attorney or advocate regarding legal interpretation of evaluation results or eligibility decisions.
Important: A student may qualify under one or more IDEA categories. The disability category selected at the IEP Team meeting (called the CSE in New York State) reflects the primary educational need, not a medical diagnosis. Eligibility always requires both (1) a qualifying disability and (2) a demonstrated adverse educational impact.
Category 1 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Specific Learning Disability (SLD)
Dyslexia · Dysgraphia · Dyscalculia · Reading Comprehension · Written Expression · Math Reasoning
⚖️ Federal Requirement (All States): The Specific Learning Disability category is defined in IDEA (34 CFR §300.8(c)(10)). Dyslexia is explicitly listed as a condition that may fall within SLD. This is a federal classification — no state may exclude dyslexia from SLD eligibility consideration.
🟥 Common Misunderstanding
Misunderstanding: "Dyslexia is not a recognized disability category under IDEA." — This is false. Dyslexia is explicitly referenced within the federal Specific Learning Disability category (34 CFR §300.8(c)(10)). It does not have its own separate IDEA category, but a student with dyslexia who meets eligibility criteria is entitled to services under the SLD category. Some states (such as Texas) have additional state-specific dyslexia laws that go beyond the federal requirement.
What IDEA says: A Specific Learning Disability is a disorder in one or more of the basic psychological processes involved in understanding or using language, spoken or written, that may manifest as an imperfect ability to listen, think, speak, read, write, spell, or do mathematical calculations. SLD includes conditions such as perceptual disabilities, brain injury, minimal brain dysfunction, dyslexia, and developmental aphasia. SLD does not include learning problems primarily resulting from visual, hearing, or motor disabilities; intellectual disability; emotional disturbance; or environmental, cultural, or economic disadvantage.
🔬 Diagnostic Composition
- Dyslexia — phonological processing deficit; decoding and word recognition weakness
- Dysgraphia — written expression disorder; handwriting, spelling, and/or composition deficits
- Dyscalculia — mathematics disability; number sense, computation, or math reasoning deficit
- Reading Fluency Disorder — accurate but slow, labored reading; fluency and rate deficits
- Reading Comprehension Disorder — adequate decoding but significant comprehension weakness
- Math Reasoning SLD — difficulty applying math concepts; word problem and applied reasoning deficits
- Oral/Written Language SLD — written expression disorder beyond mechanics
✅ Testing Domain Overview
- Cognitive processing (IQ) — full battery recommended
- Academic achievement — reading, written language, math
- Phonological processing — foundational for dyslexia diagnosis
- Reading fluency and rate
- Working memory and processing speed
- Written expression sample analysis
- Math computation vs. reasoning comparison
- Language processing (if oral language concerns present)
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to SLD |
|---|---|---|
| WISC-V or WAIS-IV | Full-scale IQ; Verbal Comprehension, Working Memory, Processing Speed, Fluid Reasoning, Visual-Spatial indices | Identifies processing profile; required for ability-achievement comparison and discrepancy analysis |
| CTOPP-2 | Phonological Awareness, Phonological Memory, Rapid Symbolic Naming, Rapid Non-Symbolic Naming | Primary instrument for dyslexia; identifies phonological processing deficits underlying reading disability |
| TOWRE-2 | Sight Word Efficiency, Phonemic Decoding Efficiency | Timed real-word and nonsense-word reading; measures fluency and decoding accuracy |
| GORT-5 | Oral reading rate, accuracy, fluency, comprehension | Connected text reading; identifies fluency deficits beyond single-word reading |
| WIAT-4 | Reading (Word Reading, Pseudoword Decoding, Reading Comprehension, Oral Reading Fluency), Written Expression, Math (Numerical Operations, Math Problem Solving, Math Fluency) | Comprehensive achievement battery; establishes academic profile across all SLD domains |
| KTEA-3 | Reading, Math, Written Language subtests | Alternative to WIAT-4; good error analysis tools for written language |
| WJ-IV ACH | Reading, Math, Written Language clusters | Often used alongside cognitive WJ-IV COG for within-battery comparisons |
| TWAS or TOWL-4 | Written expression quality, conventions, sentence construction | Deeper evaluation of dysgraphia / written expression SLD |
| KeyMath-3 | Math concepts, operations, applications | Detailed math profile for dyscalculia evaluation |
| Classroom writing sample | Applied written language; handwriting legibility and output | Contextual evidence of writing disability in real tasks |
🚩 Red Flags That May Warrant Evaluation
- Persistent difficulty learning letter-sound correspondences or phonics rules despite instruction
- Slow, labored, or inaccurate reading that does not improve at expected rate
- Significant difficulty spelling; frequent reversals, omissions, or substitutions beyond typical developmental range
- Written output substantially below verbal ability (oral responses far superior to written)
- Avoidance of reading or writing tasks; frustration, fatigue, or physical complaints during literacy activities
- Difficulty retaining math facts despite repeated practice; difficulty with number sense concepts
- Family history of dyslexia, reading difficulty, or language-based learning disability
- RTI/MTSS data showing insufficient response to scientifically based reading intervention
- Discrepancy between apparent intelligence and academic output
📝 Sample Evaluation Request Language — SLD
"I am writing to formally request a comprehensive psychoeducational evaluation for my child, [Name], to determine whether they may qualify for special education services under the category of Specific Learning Disability. My concerns include [describe specific academic concerns — e.g., ongoing difficulty with phonics and decoding, written output significantly below verbal ability, persistent math computation struggles]. I am requesting a full evaluation including, but not limited to, cognitive processing (WISC-V or equivalent), academic achievement (WIAT-4 or equivalent), phonological processing (CTOPP-2), reading fluency assessment, and written language sample analysis. I understand I have the right to an Independent Educational Evaluation (IEE) at district expense if I disagree with the district's evaluation. I request written confirmation that this evaluation will be conducted within the timelines required under IDEA and NY Part 200 regulations."
Note: This language is provided as an informational starting point. Parents may wish to consult a qualified advocate or attorney to tailor evaluation requests to their child's specific circumstances.
Category 2 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Other Health Impairment (OHI)
ADHD · Chronic Health Conditions · Limited Strength, Vitality, or Alertness
What IDEA says: Other Health Impairment means having limited strength, vitality, or alertness, including a heightened alertness to environmental stimuli, that results in limited alertness with respect to the educational environment, that is due to chronic or acute health problems such as asthma, attention deficit disorder (ADD), attention deficit hyperactivity disorder (ADHD), diabetes, epilepsy, a heart condition, hemophilia, lead poisoning, leukemia, nephritis, rheumatic fever, sickle cell anemia, and Tourette syndrome, and that adversely affects a child's educational performance.
🔬 Diagnostic Composition
- ADHD-Inattentive Type — sustained attention, task initiation, organization deficits; may be "quiet" and overlooked
- ADHD-Hyperactive/Impulsive Type — impulse control, activity regulation, behavioral inhibition deficits
- ADHD-Combined Type — combination of inattentive and hyperactive-impulsive presentations
- Epilepsy / Seizure Disorders — may cause absences, memory gaps, fatigue; impacts learning continuity
- Asthma / Respiratory Conditions — attendance impact; fatigue; medication side effects
- Tourette Syndrome — tic disorders; may co-occur with OCD, ADHD, anxiety
- Diabetes (Type 1 or 2) — blood sugar fluctuations affect attention and cognitive performance
- Other chronic conditions — cancer, heart conditions, sickle cell, lupus, Lyme disease, etc.
✅ Testing Domain Overview
- ADHD-specific rating scales (parent, teacher, self-report)
- Executive function assessment — attention, inhibition, working memory, planning
- Cognitive processing (recommended for academic planning)
- Academic achievement to identify co-occurring SLD
- Behavioral and emotional screening
- Medical documentation from treating physician
- Continuous Performance Test (CPT) optional but informative
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to OHI |
|---|---|---|
| Conners-3 or Conners CBRS | Parent and teacher ADHD ratings; Inattention, Hyperactivity, Executive Function, Learning Problems subscales | Primary norm-referenced ADHD rating scale; cross-rater comparison critical |
| BRIEF-2 | Behavior Rating Inventory of Executive Function — Inhibit, Shift, Emotional Control, Working Memory, Plan/Organize, etc. | Documents real-world executive function impact in home and school settings |
| BASC-3 | Broad behavioral/emotional screening; Externalizing, Internalizing, Adaptive Skills, Executive Function composites | Comprehensive behavioral picture; rules in/out co-occurring emotional concerns |
| WISC-V | Cognitive processing including Working Memory Index and Processing Speed Index | Working memory and processing speed deficits are hallmark cognitive markers for ADHD |
| WIAT-4 | Academic achievement across reading, writing, math | Identifies co-occurring SLD, which is present in approximately 30–50% of students with ADHD |
| D-KEFS | Delis-Kaplan Executive Function System — verbal fluency, sorting, trail making, tower planning | In-depth executive function performance testing beyond rating scales |
| IVA-QS or CPT-3 | Continuous Performance Test — sustained attention, impulsivity, reaction time | Objective, performance-based attention measure; supplements behavioral ratings |
| Medical records / physician statement | Diagnosis confirmation; treatment history; educational impact documentation | Required component for OHI eligibility; must establish adverse educational impact |
🚩 Red Flags That May Warrant Evaluation
- Chronic difficulty sustaining attention during class instruction, independent work, or homework
- Frequent incomplete assignments or lost materials despite apparent capability
- Impulsive responses, difficulty waiting, or significant difficulty with behavioral inhibition
- Inconsistent academic performance — some days significantly better than others with no clear explanation
- Fatigue, frequent absences, or health-related school avoidance
- Student receiving 504 accommodations without evaluation for special education eligibility
- ADHD diagnosis from outside provider but no school evaluation has been conducted
- Teacher reports of "daydreaming," "zoning out," or difficulty following multi-step directions
- Significant organizational and time management deficits relative to peers
📝 Sample Evaluation Request Language — OHI
"I am requesting a comprehensive evaluation for my child, [Name], to determine eligibility for special education services under Other Health Impairment. My child has a documented diagnosis of [ADHD / chronic health condition] from [physician/provider name and date], and I am concerned about the adverse educational impact this condition may be having on their academic performance, attention, organization, and daily school functioning. I am requesting evaluation components including, but not limited to, ADHD-specific rating scales (Conners-3 or equivalent, parent and teacher forms), executive function assessment (BRIEF-2), cognitive processing assessment, academic achievement evaluation, and behavioral screening. I am also requesting that the district consider and document the medical information from my child's treating physician as part of the eligibility determination process."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 3 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Autism Spectrum Disorder (ASD)
Social Communication · Restricted/Repetitive Behaviors · Sensory Processing · Language Development
What IDEA says: Autism means a developmental disability significantly affecting verbal and nonverbal communication and social interaction, generally evident before age 3, that adversely affects a child's educational performance. Other characteristics often associated with autism are engagement in repetitive activities and stereotyped movements, resistance to environmental change or change in daily routines, and unusual responses to sensory experiences. Autism does not apply if a child's educational performance is adversely affected primarily because the child has an emotional disturbance.
🔬 Diagnostic Composition
- Social communication deficits — pragmatic language, nonverbal communication, social reciprocity
- Restricted/repetitive behaviors (RRBs) — inflexible routines, stereotyped movements, restricted interests
- Sensory processing differences — hyper- or hyposensitivity to sensory input
- Language delays or atypical language development — echolalia, pronoun reversal, scripted language
- Intellectual ability varies widely — from above-average to intellectual disability range
- Executive function challenges — planning, flexibility, task initiation common
- Co-occurring conditions common — ADHD, anxiety, SLD, GI issues, sleep disorders
✅ Testing Domain Overview
- Autism-specific diagnostic instruments (ADOS-2, ADI-R)
- Developmental and social communication history
- Speech/language evaluation — pragmatic language profile
- Cognitive/intellectual assessment (adapted if needed)
- Academic achievement evaluation
- Adaptive behavior assessment
- Sensory processing screening (OT evaluation)
- Behavioral and emotional functioning
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to ASD |
|---|---|---|
| ADOS-2 | Autism Diagnostic Observation Schedule — structured observation of social communication, restricted/repetitive behaviors across 5 modules by age/language level | Gold-standard observational instrument for ASD diagnosis; requires certified administration |
| ADI-R | Autism Diagnostic Interview-Revised — structured parent interview covering social interaction, communication, restricted behaviors | Standardized developmental history; complements ADOS-2 for comprehensive diagnostic picture |
| CARS-2 | Childhood Autism Rating Scale — rating scale of autism severity across 15 domains | Useful screening and severity measure; less intensive than ADOS-2 |
| CELF-5 or CASL-2 | Receptive/expressive language; pragmatic language subtests | Identifies pragmatic language deficits; profiles communication strengths and weaknesses |
| WISC-V (or WPPSI, RIAS-2) | Cognitive ability — adapted administration may be appropriate | Establishes intellectual profile; identifies learning strengths; informs IEP programming |
| Vineland-3 | Adaptive behavior — Communication, Daily Living Skills, Socialization, Motor domains | Documents real-world functional impact; critical for programming and extended school year decisions |
| WIAT-4 | Academic achievement across all areas | Identifies co-occurring SLD; establishes academic baseline |
| BRIEF-2 | Executive function behavioral ratings | Executive function deficits are common in ASD; informs accommodations |
| SPM-2 (Sensory Processing Measure) | Sensory processing across 8 domains in home and school | Documents sensory needs that affect educational participation |
| BASC-3 | Broad behavioral/emotional functioning | Screens for co-occurring anxiety, ADHD, internalizing concerns common in ASD |
🚩 Red Flags That May Warrant Evaluation
- Significant difficulty initiating or sustaining reciprocal social interaction with peers or adults
- Unusual or limited eye contact, facial expression, or use of gesture in communication
- Rigid adherence to routines; significant distress with unexpected changes
- Intense, narrow, highly specific interests that dominate attention
- Repetitive motor movements (hand-flapping, rocking, spinning) or speech patterns (echolalia, scripting)
- Atypical sensory responses — extreme sensitivity to sound, light, texture, or pain
- Pragmatic language difficulties — difficulty understanding figurative language, humor, or social context
- Significant mismatch between academic knowledge and ability to function socially or adaptively
- Prior concerns from pediatrician or developmental specialist not yet evaluated by school
📝 Sample Evaluation Request Language — ASD
"I am requesting a comprehensive evaluation for my child, [Name], to determine whether they may qualify for special education services under the category of Autism Spectrum Disorder (or other qualifying categories). My concerns include [describe: e.g., significant social communication difficulties, restricted patterns of behavior, sensory sensitivities, and language development concerns]. I am requesting a full evaluation including autism-specific observational and/or diagnostic instruments (such as the ADOS-2), speech and language evaluation with pragmatic language assessment, cognitive/intellectual evaluation, adaptive behavior assessment (Vineland-3 or equivalent), sensory processing screening, academic achievement evaluation, and behavioral/emotional assessment. I understand this evaluation must be conducted within timelines required under IDEA and NY Part 200, and I request written confirmation of the district's response to this request."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 4 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Emotional Disturbance (ED)
📍 State Terminology Variation: New York and many states use "Emotional Disturbance." Other states (e.g., Minnesota, Ohio) use "Emotional Behavioral Disorder (EBD)" or "Serious Emotional Disturbance (SED)." These are the same federal IDEA category — only the state-level label differs.
Anxiety · Depression · Schizophrenia · OCD · Social-Emotional Disorders · Conduct Disorders
What IDEA says: Emotional Disturbance means a condition exhibiting one or more of the following characteristics over a long period of time and to a marked degree that adversely affects a child's educational performance: an inability to learn that cannot be explained by intellectual, sensory, or health factors; an inability to build or maintain satisfactory interpersonal relationships with peers and teachers; inappropriate types of behavior or feelings under normal circumstances; a general pervasive mood of unhappiness or depression; or a tendency to develop physical symptoms or fears associated with personal or school problems. The term includes schizophrenia but does not apply to children who are socially maladjusted, unless it is determined that they have an emotional disturbance.
🔬 Diagnostic Composition
- Anxiety disorders — generalized anxiety, separation anxiety, social anxiety, school refusal
- Depressive disorders — major depressive disorder, persistent depressive disorder, dysthymia
- Obsessive-Compulsive Disorder (OCD) — intrusive thoughts, compulsive behaviors affecting school functioning
- Post-Traumatic Stress Disorder (PTSD) — trauma history impacting learning and behavior
- Schizophrenia or psychotic disorders — rare in school age; significant educational impact
- Conduct disorder or oppositional presentations — when rooted in emotional disorder, not pure social maladjustment
- Selective mutism — anxiety-based communication refusal in specific settings
✅ Testing Domain Overview
- Behavioral/emotional rating scales (multi-rater)
- Anxiety and depression screening tools
- Trauma screening
- Cognitive assessment to rule out intellectual factors
- Academic achievement evaluation
- Functional Behavior Assessment (FBA)
- Social skills and peer relationship assessment
- Records from outside mental health provider (with consent)
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to ED |
|---|---|---|
| BASC-3 | Multi-rater behavioral/emotional assessment — Externalizing, Internalizing, School Problems, Adaptive Skills composites | Comprehensive behavioral/emotional picture across home and school settings |
| MASC-2 | Multidimensional Anxiety Scale for Children — Social Anxiety, Physical Symptoms, Harm Avoidance, Separation/Panic | Primary norm-referenced anxiety rating scale for school-age children and adolescents |
| CDI-2 | Children's Depression Inventory — Self-report and parent form; Negative Mood, Interpersonal, Ineffectiveness, Anhedonia, Negative Self-Esteem | Primary self-report depression measure; identifies depressive symptoms |
| CPSS-5 | Child PTSD Symptom Scale — PTSD symptoms across Re-experiencing, Avoidance, Arousal | Trauma symptom screening; identifies PTSD presentations affecting school functioning |
| Conners-3 or ADHD Rating Scales | ADHD symptoms | Rules out or identifies co-occurring ADHD, which is common alongside anxiety and depression |
| WISC-V | Cognitive/intellectual assessment | Required to rule out intellectual factors as primary cause of learning difficulty |
| WIAT-4 | Academic achievement | Documents adverse educational impact on academic performance |
| FBA (Functional Behavior Assessment) | Antecedents, behaviors, consequences; function of challenging behavior | Required basis for Behavior Intervention Plan (BIP); documents behavioral pattern |
| Social-emotional observation / teacher narrative | Social interaction quality, peer relationships, classroom emotional functioning | IDEA requires documentation of inability to build/maintain satisfactory peer relationships |
🚩 Red Flags That May Warrant Evaluation
- Persistent school refusal, somatic complaints (headaches, stomachaches) tied to school attendance
- Chronic inability to form or maintain friendships; significant social isolation
- Academic decline not explained by learning disability or health factors
- Flat affect, withdrawal, or pervasive sadness over extended period
- Behaviors that are qualitatively different from peers (not just "bad behavior") and appear emotionally driven
- History of trauma or adverse childhood experiences (ACEs) with no school-based support
- Outside mental health diagnosis (anxiety, depression, PTSD) without corresponding school evaluation
- Frequent disciplinary referrals for behavior that may be manifestation of emotional disability
- Self-harm ideation noted by school staff or outside providers
📝 Sample Evaluation Request Language — ED
"I am requesting a comprehensive evaluation for my child, [Name], to determine eligibility for special education services under the category of Emotional Disturbance, or any other qualifying disability category. My concerns include [describe: e.g., persistent anxiety-related school refusal, inability to maintain peer relationships, significant decline in academic performance, and emotional symptoms documented by an outside mental health provider]. I am requesting evaluation components including behavioral and emotional rating scales (BASC-3 or equivalent, parent and teacher forms), anxiety and depression-specific screening tools, a Functional Behavior Assessment, cognitive and academic achievement evaluation, and review of available records from outside mental health providers (with my consent). I am requesting this evaluation be completed within required timelines under IDEA and NY Part 200."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 5 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Intellectual Disability (ID)
Mild · Moderate · Severe · Profound — Adaptive Behavior Deficits + Cognitive Limitations
What IDEA says: Intellectual Disability means significantly subaverage general intellectual functioning, existing concurrently with deficits in adaptive behavior and manifested during the developmental period, that adversely affects a child's educational performance. (Note: IDEA uses this updated terminology; the term "mental retardation" previously used in federal law was changed by Rosa's Law in 2010.)
🔬 Diagnostic Composition
- Mild ID — IQ approximately 55–70; significant but most independent adaptive functioning; academic instruction with substantial support
- Moderate ID — IQ approximately 40–55; limited academic skills; functional curriculum emphasis; supported community living
- Severe ID — IQ approximately 25–40; minimal academic skills; life skills focus; significant support needs
- Profound ID — IQ below 25; very limited communication and self-care; most intensive support
- Adaptive behavior deficits — required component: conceptual, social, and practical adaptive domains must be affected
- Down Syndrome, Fragile X, other genetic conditions — common etiologies; co-occurring conditions vary widely
✅ Testing Domain Overview
- Standardized IQ / cognitive assessment (with appropriate norming)
- Adaptive behavior assessment (multiple informants)
- Academic achievement evaluation
- Speech and language evaluation
- Occupational therapy and motor assessment
- Behavioral and emotional screening
- Medical records and developmental history
- Functional academic skills assessment
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to ID |
|---|---|---|
| WISC-V, WPPSI-IV, or SB5 | Full Scale IQ; cognitive indices across verbal, nonverbal, fluid, working memory, processing speed domains | Establishes intellectual functioning level; significantly below average performance is one required criterion |
| WASI-2 | Brief IQ screening (Vocabulary + Matrix Reasoning) | Quick cognitive screen when full battery is not feasible or as cross-check |
| Leiter-3 | Nonverbal cognitive assessment — no language required | Appropriate when language limitations make verbal cognitive tests invalid |
| Vineland-3 | Adaptive behavior — Communication, Daily Living Skills, Socialization, Motor Skills | Required criterion: must demonstrate adaptive behavior deficits concurrent with cognitive limitations |
| ABAS-3 | Adaptive Behavior Assessment System — General Adaptive Composite across 11 skill areas | Alternative/supplement to Vineland-3; documents functional adaptive limitations |
| WIAT-4 or KTEA-3 | Academic achievement | Documents academic functioning level; informs curriculum planning |
| CELF-5 or PLS-5 | Receptive/expressive language | Language evaluation is critical; many students with ID have significant language delays |
| BASC-3 | Behavioral/emotional functioning | Identifies co-occurring behavioral or emotional concerns common in ID population |
🚩 Red Flags That May Warrant Evaluation
- Significantly delayed developmental milestones (language, motor, self-care) from early childhood
- Academic functioning substantially below grade level across all domains with slow rate of learning
- Significant difficulty with daily living skills, self-care, or functional independence
- Difficulty following multi-step directions or reasoning through abstract concepts
- Communication functioning significantly behind same-age peers
- Known genetic condition (Down Syndrome, Fragile X, Angelman) without a current school evaluation
- Prior evaluation showing borderline intellectual functioning (70–80 range) with academic struggles — re-evaluation may be warranted
- Student classified under another category but adaptive behavior deficits suggest ID may also be present
📝 Sample Evaluation Request Language — ID
"I am requesting a comprehensive evaluation for my child, [Name], to assess their cognitive, adaptive, academic, and related functional abilities, and to determine eligibility for special education services. My concerns include [describe: e.g., significantly delayed developmental milestones, difficulty with academic tasks across all areas, and challenges with daily living and self-care skills relative to same-age peers]. I am requesting a full evaluation including intellectual/cognitive assessment, adaptive behavior assessment (Vineland-3 or equivalent, multiple informants), academic achievement evaluation, speech and language evaluation, and any other evaluations the team deems appropriate. I understand the evaluation must comply with required timelines under IDEA and NY Part 200."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 6 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Developmental Delay (DD)
Ages 3–9 Only · Broad Eligibility Bridge · Multiple Developmental Domains
What IDEA says: Developmental Delay, for children from ages 3 through 9 (or any subset of that age range, as a state chooses), may be used for children who are experiencing developmental delays, as defined by the State and as measured by appropriate diagnostic instruments and procedures, in one or more of the following areas: physical development, cognitive development, communication development, social or emotional development, or adaptive development, and who by reason thereof, need special education and related services.
📍 New York State: In New York, this category (called "Preschool Student with a Disability" for children ages 3–5, and "Developmental Delay" for ages 6–8) is available for students ages 3–8 under Part 200 Regulations. The age range varies by state — some states use ages 3–9, others use different subsets. Check your state's regulations for the applicable age range.
🔬 Diagnostic Composition
- Physical/motor delay — gross motor, fine motor, or both; below age-expected milestones
- Cognitive/intellectual delay — significantly below average cognitive functioning; not yet differentiated as ID
- Communication/language delay — expressive, receptive, or pragmatic language below age expectations
- Social-emotional delay — delayed social development; emotional regulation below developmental norms
- Adaptive behavior delay — self-care, daily living, independent functioning below age expectations
- Global developmental delay — delays across multiple domains simultaneously
- DD is a transitional category — at age 9 (NY), child must be re-evaluated under a specific IDEA disability category if services are to continue
✅ Testing Domain Overview
- Developmental assessment instruments (age-appropriate)
- Cognitive/intellectual evaluation
- Speech and language evaluation
- Occupational therapy evaluation (fine motor, sensory)
- Physical therapy evaluation (gross motor)
- Adaptive behavior assessment
- Behavioral and social-emotional screening
- Developmental history and medical records
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to DD |
|---|---|---|
| Bayley-4 or BSID-4 | Cognitive, Language, Motor, Social-Emotional, Adaptive Behavior scales for ages 1–42 months | Primary developmental assessment for youngest children; comprehensive profile across all DD domains |
| WPPSI-IV | Cognitive assessment for ages 2:6–7:7 | IQ profile for preschool/early school-age children; identifies cognitive delay |
| PLS-5 | Preschool Language Scales — Auditory Comprehension, Expressive Communication | Age-appropriate language assessment from birth to 7:11; primary language assessment for DD population |
| PDMS-3 | Peabody Developmental Motor Scales — Gross Motor, Fine Motor, Total Motor Quotient | Standardized motor development assessment for birth through age 6; identifies motor delay |
| Vineland-3 or ABAS-3 | Adaptive behavior across all domains | Documents functional adaptive delay; required component of DD eligibility determination |
| DECA or DESSA | Social-emotional competence screening for early childhood | Identifies social-emotional developmental delays; informs programming |
| BASC-3 Preschool | Behavioral/emotional functioning (preschool norms) | Identifies behavioral concerns that may accompany developmental delay |
🚩 Red Flags That May Warrant Evaluation
- Missed or delayed developmental milestones in motor, language, social, or cognitive domains
- Language significantly behind age peers — limited vocabulary, single words only when multi-word phrases expected
- Difficulty with age-appropriate self-care tasks (dressing, feeding, toileting) beyond typical range
- Significant challenges with social interaction, play skills, or turn-taking
- Early childhood educator or pediatrician expressing developmental concerns
- Early Intervention services (birth–3) ending without continuation evaluation for school-age services
- Student aged 7–8 approaching the age 9 NY deadline — re-evaluation under specific category should be planned proactively
📝 Sample Evaluation Request Language — DD
"I am requesting a comprehensive developmental evaluation for my child, [Name], who is currently [age] years old, to determine eligibility for special education services under the Developmental Delay category. My concerns include [describe: e.g., significant delays in language development, motor skills, and adaptive functioning relative to same-age peers]. I am requesting evaluation components including cognitive/developmental assessment, speech and language evaluation, occupational and/or physical therapy evaluation as appropriate, adaptive behavior assessment, and behavioral/social-emotional screening. If my child is approaching age 9, I also request that the district proactively plan re-evaluation under a specific disability category as required by NY Part 200."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 7 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Speech or Language Impairment (SLI)
Articulation · Fluency · Voice · Expressive Language · Receptive Language · Pragmatics
What IDEA says: Speech or Language Impairment means a communication disorder, such as stuttering, impaired articulation, a language impairment, or a voice impairment, that adversely affects a child's educational performance. This may include difficulty in one or more areas of communication: articulation (speech sound production), fluency (stuttering), voice (pitch, resonance, loudness), and language (the form, content, or use of language — morphology, syntax, semantics, pragmatics).
🔬 Diagnostic Composition
- Articulation/Phonological Disorder — incorrect sound production; substitutions, omissions, distortions
- Fluency Disorder (Stuttering) — disruptions in speech flow; blocks, prolongations, repetitions
- Voice Disorder — abnormal pitch, resonance, or quality; vocal nodules, vocal fatigue
- Expressive Language Disorder — difficulty formulating vocabulary, sentences, or narratives
- Receptive Language Disorder — difficulty understanding spoken language, following directions
- Pragmatic Language Disorder — difficulty using language for social purposes; topic maintenance, conversational rules
- Developmental Language Disorder (DLD) — persistent expressive/receptive language deficits not explained by other conditions
✅ Testing Domain Overview
- Standardized language assessment (comprehensive battery)
- Articulation and phonological process assessment
- Fluency assessment (if stuttering concerns)
- Oral motor/speech mechanism examination
- Language sample analysis (connected speech)
- Pragmatic language assessment
- Phonological awareness skills
- Hearing screening (always rule out hearing loss first)
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to SLI |
|---|---|---|
| CELF-5 | Clinical Evaluation of Language Fundamentals — Receptive Language, Expressive Language, Core Language Score, Pragmatics Profile, Language Content, Memory/Learning subtests | Primary comprehensive language battery for school-age children; establishes overall language profile |
| CASL-2 | Comprehensive Assessment of Spoken Language — Lexical/Semantic, Syntactic, Supralinguistic, Pragmatic subtests | Strong for higher-level language and pragmatic assessment; useful for older students |
| PLS-5 | Preschool Language Scales | Primary language assessment birth through age 7:11 |
| GFTA-3 | Goldman-Fristoe Test of Articulation-3 — sound production in words and sentences; error pattern analysis | Standard articulation assessment; required for articulation/phonological disorder documentation |
| CTOPP-2 | Phonological processing — Phonological Awareness, Phonological Memory, Rapid Naming | Identifies phonological processing deficits underlying both speech-sound disorder and reading disability |
| EVT-3 / PPVT-5 | Expressive and receptive vocabulary | Vocabulary assessment; useful for word-finding and semantic language concerns |
| TAPS-4 | Test of Auditory Processing Skills — auditory memory, phonological processing, comprehension | Assesses auditory processing as it relates to language comprehension |
| Language Sample Analysis | Mean Length of Utterance (MLU), syntactic complexity, narrative structure | Connected speech analysis provides real-world picture beyond standardized testing |
| Pure Tone Audiogram | Hearing thresholds across frequencies | Must rule out hearing loss as cause of speech/language delay before SLI classification |
🚩 Red Flags That May Warrant Evaluation
- Speech that is difficult to understand by unfamiliar listeners beyond developmentally expected age
- Limited vocabulary compared to peers; word-finding difficulties ("tip of the tongue" frequently)
- Difficulty following multi-step directions or understanding complex instructions
- Short, simple sentences when longer/more complex language is developmentally expected
- Significant stuttering — blocks, prolongations, or repetitions that affect communication and academic participation
- Unusual voice quality (hoarseness, hypernasality, hyponasality) persisting more than a few weeks
- Social communication difficulties (not explained by ASD) — topic maintenance, conversational turn-taking problems
- Reading difficulties that appear related to language or phonological processing weaknesses
- Early concerns from pediatrician not yet evaluated by school SLP
📝 Sample Evaluation Request Language — SLI
"I am requesting a comprehensive speech and language evaluation for my child, [Name], to determine eligibility for special education services under Speech or Language Impairment and to assess any adverse educational impact. My concerns include [describe: e.g., difficulty understanding complex directions, limited expressive vocabulary, articulation errors affecting intelligibility, and difficulty with connected spoken language]. I am requesting a full evaluation by a certified Speech-Language Pathologist including standardized language assessment (CELF-5 or equivalent), articulation assessment, phonological processing evaluation, pragmatic language assessment, and a language sample. I also request a hearing screening as part of this evaluation. I request written confirmation of the district's response within required timelines."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 8 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Visual Impairment Including Blindness (VI)
Low Vision · Cortical Visual Impairment · Visual Processing · Blindness
What IDEA says: Visual Impairment Including Blindness means an impairment in vision that, even with correction, adversely affects a child's educational performance. The term includes both partial sight and blindness. Students with visual impairments may qualify for a Teacher of the Visually Impaired (TVI) and/or Orientation and Mobility (O&M) specialist services in addition to general special education services.
🔬 Diagnostic Composition
- Low Vision — best corrected visual acuity 20/70 to 20/200; functional but limited
- Blindness — best corrected visual acuity 20/200 or worse, or visual field of 20° or less
- Cortical/Cerebral Visual Impairment (CVI) — vision loss due to neurological causes; acuity may be near normal but visual processing is impaired
- Ocular conditions — glaucoma, cataracts, retinopathy, albinism, retinal dystrophies
- Visual field deficits — peripheral or central field loss affecting reading, mobility, navigation
- Visual perceptual/processing disorders — difficulty interpreting visual information despite adequate acuity (may be separate from VI category)
✅ Testing Domain Overview
- Ophthalmological/optometric clinical evaluation (required)
- Functional Vision Assessment (FVA) by TVI
- Learning Media Assessment (LMA)
- Visual perceptual processing assessment
- Orientation and Mobility assessment (O&M)
- Cognitive assessment (adapted for vision limitations)
- Academic achievement assessment
- Adaptive behavior evaluation
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to VI |
|---|---|---|
| Clinical Vision Exam (ophthalmologist/optometrist) | Visual acuity (corrected and uncorrected), visual fields, ocular health, CVI evaluation | Medical documentation required for VI eligibility; must confirm vision impairment that adversely affects education |
| Functional Vision Assessment (FVA) | How student actually uses vision in real-world tasks: reading, writing, mobility, near/distance tasks | Conducted by TVI; determines educational impact beyond clinical acuity measurements |
| Learning Media Assessment (LMA) | Determines optimal reading medium: print, Braille, auditory, or combination | Required for students with VI; guides literacy instruction decisions |
| TVPS-4 | Test of Visual Perceptual Skills — Figure Ground, Visual Closure, Spatial Relations, Form Constancy, Sequential Memory, Visual Discrimination | Visual perception assessment; useful when visual processing concerns present alongside acuity issues |
| MVPT-4 | Motor-Free Visual Perception Test — spatial orientation, visual discrimination, figure-ground | Motor-free assessment of visual processing; appropriate when motor limitations may confound other assessments |
| WISC-V (adapted) or UNIT-2 | Cognitive assessment adapted for vision impairment | Verbal subtests only may be used; establishes intellectual profile; UNIT-2 is nonverbal and may be more appropriate |
| Orientation and Mobility (O&M) Assessment | Independent travel skills, body image, spatial concepts, use of white cane or assistive technology | Required to determine if O&M specialist services are needed; critical for functional independence |
🚩 Red Flags That May Warrant Evaluation
- Holds reading materials unusually close or far from face; tilts head to view material
- Eye fatigue, rubbing, tearing, or complaints of blurry or double vision
- Difficulty tracking text across a line; skips lines or loses place frequently
- Avoidance of near or distance visual tasks; resistance to visual activities
- Known medical eye condition (glaucoma, CVI, retinal dystrophy, albinism) without functional vision assessment
- Visual acuity at or near 20/70 even with correction
- Difficulty with visual-motor tasks (cutting, tracing, handwriting) beyond fine motor explanation
- Neurological history (prematurity, TBI, stroke) that may involve cortical visual impairment
📝 Sample Evaluation Request Language — VI
"I am requesting a comprehensive evaluation for my child, [Name], to determine eligibility for special education services under Visual Impairment. My child has [describe: e.g., a documented diagnosis of [condition] from their ophthalmologist, and I have concerns about how their vision impairment is affecting reading, classroom participation, and independent mobility]. I am requesting a Functional Vision Assessment and Learning Media Assessment by a qualified Teacher of the Visually Impaired, an Orientation and Mobility assessment, academic achievement evaluation, and cognitive assessment adapted as appropriate for vision limitations. I am also requesting the district consider and review clinical documentation from my child's vision care provider."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 9 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Hearing Impairment Including Deafness (HI)
Conductive · Sensorineural · Mixed · Auditory Processing Disorder
What IDEA says: Hearing Impairment means an impairment in hearing, whether permanent or fluctuating, that adversely affects a child's educational performance but that is not included under the definition of deafness. Deafness means a hearing impairment that is so severe that the child is impaired in processing linguistic information through hearing, with or without amplification, that adversely affects a child's educational performance. IDEA treats deafness and hearing impairment as separate but related categories; for IEP purposes, they are often administered together under this classification.
🔬 Diagnostic Composition
- Conductive Hearing Loss — outer/middle ear dysfunction; often medically treatable; fluid, ear infections, structural issues
- Sensorineural Hearing Loss (SNHL) — inner ear or auditory nerve damage; typically permanent
- Mixed Hearing Loss — both conductive and sensorineural components
- Auditory Neuropathy Spectrum Disorder (ANSD) — outer hair cells intact but auditory nerve transmission disrupted
- Auditory Processing Disorder (APD) — normal peripheral hearing; difficulty processing and interpreting auditory information at cortical level
- Unilateral Hearing Loss — one ear affected; often missed; can significantly impact classroom learning
- Fluctuating Hearing Loss — often due to chronic otitis media; literacy impact significant despite intermittent nature
✅ Testing Domain Overview
- Audiological evaluation (pure tone, speech audiometry)
- Tympanometry and immittance testing
- Auditory brainstem response (ABR) if indicated
- SCAN-3 or equivalent for APD evaluation
- Speech and language evaluation
- Cognitive assessment (adapted if needed)
- Academic achievement evaluation
- Hearing technology assessment (hearing aids, FM/DM systems, cochlear implant mapping)
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to HI |
|---|---|---|
| Pure Tone Audiogram | Hearing thresholds at frequencies 250–8000 Hz; air and bone conduction; degree and configuration of hearing loss | Foundational audiological measure; documents nature and degree of hearing loss |
| Tympanometry | Middle ear function — mobility of tympanic membrane, middle ear pressure, Eustachian tube function | Identifies conductive component (fluid, pressure); important for fluctuating hearing loss |
| Speech Audiometry (SRT, WRS) | Speech Reception Threshold; Word Recognition Score in quiet and noise | Functional hearing — how well student understands speech; performance in noise is critical for classroom context |
| SCAN-3:C or SCAN-3:A | Auditory Processing — Filtered Words, Auditory Figure Ground, Competing Words, Competing Sentences | Standard APD screening battery; identifies auditory processing deficits beyond peripheral hearing |
| Auditory Brainstem Response (ABR) | Neural response to sound through brainstem; threshold estimation | Objective hearing assessment when behavioral audiometry is not reliable |
| CELF-5 or CASL-2 | Language comprehension and expression | Documents language impact of hearing loss; speech/language evaluation always recommended for HI students |
| WISC-V (adapted) or nonverbal cognitive instruments | Cognitive assessment with appropriate accommodations | Establishes intellectual profile; may need nonverbal administration for students with significant language delays due to hearing loss |
| WIAT-4 | Academic achievement | Documents reading, language arts, and math performance; hearing loss significantly impacts phonological awareness and literacy |
🚩 Red Flags That May Warrant Evaluation
- Frequent requests for repetition; misunderstanding spoken directions despite adequate attention
- Difficulty hearing in noisy environments (cafeteria, hallway, open classrooms)
- History of chronic ear infections (otitis media), especially before age 5
- Speech and language delays without other clear explanation
- Phonological awareness difficulties and early reading struggles
- Known sensorineural hearing loss not accompanied by a current school-based evaluation
- Student using hearing aids or cochlear implant without documented school hearing technology plan (e.g., FM/DM system evaluation)
- Poor performance in oral language tasks despite apparently normal hearing on classroom screening
- Unilateral hearing loss confirmed by audiologist but school has not conducted educational evaluation
📝 Sample Evaluation Request Language — HI
"I am requesting a comprehensive evaluation for my child, [Name], to determine eligibility for special education services under Hearing Impairment and to assess the educational impact of their hearing condition. My child has [describe: e.g., a documented sensorineural hearing loss / chronic otitis media history / Auditory Processing Disorder concerns]. I am requesting a full audiological evaluation (or review of current audiologist reports), speech and language evaluation, academic achievement evaluation, cognitive assessment with appropriate accommodations, and assessment of hearing technology needs including FM/DM system appropriateness. I request written confirmation of the district's response and evaluation timeline."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 10 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Orthopedic Impairment (OI)
Physical Disabilities · Neuromotor Conditions · Musculoskeletal Disorders · Congenital Anomalies
What IDEA says: Orthopedic Impairment means a severe orthopedic impairment that adversely affects a child's educational performance. The term includes impairments caused by a congenital anomaly, impairments caused by disease (e.g., poliomyelitis, bone tuberculosis), and impairments from other causes (e.g., cerebral palsy, amputations, and fractures or burns that cause contractures). Physical therapy and occupational therapy are related services frequently provided under this category.
🔬 Diagnostic Composition
- Cerebral Palsy (CP) — motor disorder from early brain injury; spastic, athetoid, ataxic subtypes; range of severity
- Spina Bifida — spinal cord neural tube defect; limb paralysis, bladder/bowel involvement; hydrocephalus common
- Muscular Dystrophy — progressive muscle weakness; Duchenne, Becker, and other forms
- Limb differences / amputations — congenital or acquired; prosthetic and assistive device needs
- Juvenile Rheumatoid Arthritis — chronic joint inflammation; pain and mobility limitations
- Scoliosis or spinal conditions — when severe enough to affect educational access
- Post-surgical or traumatic conditions — burns with contracture, fractures with lasting impact
✅ Testing Domain Overview
- Physical Therapy evaluation (gross motor, mobility, assistive devices)
- Occupational Therapy evaluation (fine motor, self-care, AT needs)
- Cognitive assessment (adapted for motor limitations)
- Academic achievement evaluation (adapted)
- Assistive technology evaluation
- Speech/language evaluation (if oral motor involvement)
- Adaptive behavior assessment
- Medical records and physician documentation
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to OI |
|---|---|---|
| BOT-2 (adapted sections) | Bruininks-Oseretsky Test of Motor Proficiency — Fine Manual Control, Manual Coordination, Body Coordination, Strength & Agility | Standardized motor assessment; portions adapted or selectively used based on OI presentation; establishes motor profile |
| PDMS-3 | Peabody Developmental Motor Scales — Gross and Fine Motor (younger students) | Developmental motor assessment for younger children; tracks progress over time |
| Beery VMI (VMI-6) | Visual-Motor Integration; Visual Perception; Motor Coordination | Assesses visual-motor writing/drawing skill; relevant for handwriting and written output accommodations |
| SFA (School Function Assessment) | Participation, Task Supports, Activity Performance across school settings | Functional assessment of school-based participation; directly informs IEP accommodations and PT/OT goals |
| ETCH (Evaluation Tool of Children's Handwriting) | Legibility, speed, and quality of handwriting in manuscript and cursive | Documents handwriting deficits requiring AT (keyboard, voice-to-text) accommodations |
| WISC-V (adapted) or UNIT-2 | Cognitive assessment with motor-reduced or nonverbal administration | Motor limitations may require modified administration; verbal subtests only or nonverbal instruments may be appropriate |
| Assistive Technology Evaluation | AAC, seating/positioning, computer access, writing accommodations needs | Students with OI often have significant AT needs; comprehensive AT evaluation informs IEP |
🚩 Red Flags That May Warrant Evaluation
- Known physical or orthopedic condition without current school-based PT/OT evaluation
- Difficulty accessing classroom materials, maintaining posture, or navigating the school environment
- Significantly impaired handwriting or written output relative to cognitive ability
- Fatigue that limits academic participation due to physical demands
- Need for specialized seating, positioning, or assistive technology not currently assessed
- Recent surgery or injury resulting in new or changed physical limitations affecting school participation
- Medical condition that affects fine or gross motor skill needed for academic tasks
📝 Sample Evaluation Request Language — OI
"I am requesting a comprehensive evaluation for my child, [Name], to determine eligibility for special education services under Orthopedic Impairment. My child has [describe: e.g., a diagnosis of cerebral palsy affecting their fine motor and writing abilities, which is having a documented adverse impact on their academic participation]. I am requesting Physical Therapy and Occupational Therapy evaluations, an Assistive Technology evaluation, cognitive assessment adapted for motor limitations, academic achievement evaluation adapted appropriately, and adaptive behavior assessment. I also request the district review medical records from my child's treating physicians and therapists. Please confirm receipt of this request and the applicable evaluation timeline."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 11 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Traumatic Brain Injury (TBI)
Acquired Brain Injury · Concussion · Post-Injury Cognitive & Behavioral Changes
What IDEA says: Traumatic Brain Injury means an acquired injury to the brain caused by an external physical force, resulting in total or partial functional disability or psychosocial impairment, or both, that adversely affects a child's educational performance. The term applies to open or closed head injuries resulting in impairments in one or more areas, such as: cognition; language; memory; attention; reasoning; abstract thinking; judgment; problem-solving; sensory, perceptual, and motor abilities; psychosocial behavior; physical functions; information processing; and speech. The term does not apply to brain injuries that are congenital or degenerative, or to brain injuries induced by birth trauma.
🔬 Diagnostic Composition
- Mild TBI / Concussion — brief loss of consciousness or altered mental state; cognitive and behavioral symptoms may persist (Post-Concussion Syndrome)
- Moderate TBI — longer loss of consciousness; significant cognitive/behavioral sequelae
- Severe TBI — extended coma or post-traumatic amnesia; major functional impairments
- Diffuse Axonal Injury — widespread white matter damage; processing speed and working memory most affected
- Focal Injuries — damage concentrated in specific brain regions; symptoms depend on location
- Common post-injury areas of impact: attention, processing speed, memory, executive function, social cognition, fatigue, sensory sensitivities, mood/emotional regulation
✅ Testing Domain Overview
- Neuropsychological evaluation (preferred post-TBI)
- Pre-injury vs. current cognitive comparison (when prior data exists)
- Attention and processing speed assessment
- Memory and learning assessment
- Executive function assessment
- Academic achievement (current functioning)
- Behavioral and emotional functioning
- Speech/language evaluation if indicated
- PT/OT if motor involvement
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to TBI |
|---|---|---|
| WISC-V or WAIS-IV | Full cognitive profile with particular attention to Processing Speed Index and Working Memory Index | Establishes current intellectual functioning; processing speed and working memory are most commonly affected post-TBI |
| CVLT-C or CVLT-3 | California Verbal Learning Test — verbal memory encoding, consolidation, retrieval; learning curve; intrusions and interference | Memory and learning assessment critical post-TBI; documents declarative memory deficits |
| RCFT (Rey Complex Figure) | Visuospatial memory, organization, and planning | Visual memory and organizational strategy post-injury; identifies visuospatial deficits |
| D-KEFS | Executive function — verbal fluency, cognitive flexibility, planning, inhibition | Detailed executive function profile; frequently impaired post-TBI regardless of severity |
| BRIEF-2 | Real-world executive function (parent and teacher report) | Documents functional executive function impact in home and school settings |
| Conners CPT-3 or IVA-QS | Sustained attention, vigilance, impulsivity, reaction time | Objective attention measure; attention and processing speed deficits are hallmark TBI sequelae |
| BASC-3 | Emotional and behavioral functioning | Identifies anxiety, depression, somatic complaints, and behavioral changes common post-TBI |
| WIAT-4 | Academic achievement | Documents current academic functioning vs. pre-injury records if available |
| Medical records from treating team | Injury documentation, neuroimaging, rehabilitation records | Required to establish TBI as cause; prior testing from rehabilitation team may inform school evaluation |
🚩 Red Flags That May Warrant Evaluation
- Documented head injury (concussion, TBI) without a school re-evaluation to document educational impact
- Significant academic decline following an injury event
- Increased fatigue, headaches, or sensory sensitivities after return to school post-injury
- New attention or memory difficulties not present before injury
- Behavioral or emotional changes (irritability, depression, anxiety, impulsivity) following head injury
- Student classified under a different category (e.g., SLD, OHI) whose history includes TBI that may have been overlooked
- Sports-related concussion history with incomplete academic recovery plan
- Difficulty with word retrieval, language speed, or verbal fluency after injury
📝 Sample Evaluation Request Language — TBI
"I am requesting a comprehensive evaluation, including neuropsychological assessment if available, for my child, [Name], to determine eligibility for special education services under Traumatic Brain Injury. My child sustained a [describe: e.g., moderate traumatic brain injury / concussion with post-concussion syndrome] on [approximate date], and I have observed [describe: e.g., significant changes in memory, processing speed, attention, and academic performance since the injury]. I am requesting evaluation components including cognitive assessment (with attention to processing speed, working memory, and memory/learning functions), academic achievement evaluation, executive function assessment, behavioral and emotional assessment, and review of medical and rehabilitation records from my child's treating team. I understand this evaluation must comply with required timelines under IDEA and NY Part 200."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 12 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Deaf-Blindness
Combined Hearing & Vision Loss · CHARGE Syndrome · Usher Syndrome · Complex Communication Needs
What IDEA says: Deaf-Blindness means concomitant hearing and visual impairments, the combination of which causes such severe communication and other developmental and educational needs that they cannot be accommodated in special education programs solely for children with deafness or children with blindness. Deaf-Blindness does not require that a child be completely deaf or completely blind — the combination of the two impairments together creates unique and intensive educational needs.
🔬 Diagnostic Composition
- CHARGE Syndrome — Coloboma, Heart defects, choanal Atresia, growth Retardation, Genital/Ear abnormalities; leading cause of deaf-blindness
- Usher Syndrome — inherited; sensorineural hearing loss + retinitis pigmentosa causing progressive vision loss
- Congenital Rubella Syndrome — combined vision and hearing impairment from prenatal rubella exposure
- Prematurity complications — retinopathy of prematurity + hearing loss
- Acquired causes — meningitis, encephalitis, TBI resulting in combined impairment
- Communication forms vary widely — tactile sign language, object cues, calendar systems, Braille, residual vision/hearing use
✅ Testing Domain Overview
- Functional vision assessment (TVI)
- Audiological evaluation and functional hearing assessment
- Functional communication assessment
- Adaptive behavior assessment (multiple informants)
- Cognitive assessment adapted for sensory limitations
- Orientation and Mobility evaluation
- Intervener/DeafBlind specialist consultation
- Medical records from multidisciplinary team
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to Deaf-Blindness |
|---|---|---|
| Clinical Vision Exam + FVA | Ophthalmologic evaluation + Functional Vision Assessment by TVI | Documents nature and degree of visual impairment; functional vision use in real environments |
| Audiological Evaluation (with ABR) | Pure tone audiogram; ABR; speech audiometry; aided hearing thresholds | Documents hearing status; identifies usable residual hearing |
| INSITE or CHARGE Syndrome Scales | Developmental checklists for deaf-blind population across communication, cognition, motor, social domains | Specialized tools normed or designed for dual sensory impairment; standard instruments often inappropriate |
| Vineland-3 | Adaptive behavior — Communication, Daily Living, Socialization, Motor | Adaptive behavior assessment is critical; standard cognitive testing often not valid; adaptive measures more informative |
| Communication Matrix (Rowland) | Communication forms and functions across pre-intentional through formal symbolic communication | Assesses communication level for non-speaking or complex communication needs students |
| Callier-Azusa Scale (G Edition) | Developmental assessment for deaf-blind: motor, daily living, language, cognition, social development | Designed specifically for deaf-blind population; appropriate when standard instruments are invalid |
| O&M Assessment | Travel skills, sensory use for navigation, environmental orientation | Orientation and Mobility specialist evaluation required; deaf-blind O&M needs are highly specialized |
🚩 Red Flags That May Warrant Evaluation
- Known diagnosis of CHARGE Syndrome, Usher Syndrome, or other condition associated with combined sensory impairment without current school evaluation under this category
- Both vision and hearing impairments documented by medical providers but classified only under HI or VI
- Communication needs that exceed what is being addressed under a single sensory impairment classification
- Progressive vision loss in a student with existing hearing impairment (Usher Syndrome pattern)
- Absence of an intervener or Deaf-Blind specialist on the educational team despite dual sensory needs
- Prior meningitis, encephalitis, or severe TBI in a student with new sensory impairments
📝 Sample Evaluation Request Language — Deaf-Blindness
"I am requesting a comprehensive evaluation for my child, [Name], to determine eligibility for special education services under the Deaf-Blindness category. My child has documented [hearing impairment and vision impairment] diagnosed by [describe providers], and I have concerns that the combination of these impairments is creating educational and communication needs that cannot be fully addressed under a single sensory impairment classification. I am requesting evaluation components including Functional Vision Assessment by a TVI, audiological evaluation, adaptive behavior assessment, functional communication assessment, Orientation and Mobility evaluation, and cognitive assessment adapted for dual sensory limitations. I also request consultation from a Deaf-Blind educational specialist or intervener as part of the evaluation process."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Category 13 of 13
⚖️ Federal IDEA Category — 34 CFR §300.8 — All 50 States
Multiple Disabilities
Two or More Co-Occurring Disabilities · Complex Educational Needs · Intensive Support Requirements
What IDEA says: Multiple Disabilities means concomitant impairments (such as intellectual disability with blindness, or intellectual disability with orthopedic impairment), the combination of which causes such severe educational needs that they cannot be accommodated in special education programs solely for one of the impairments. Multiple Disabilities does not include deaf-blindness (which has its own separate IDEA category). The combination of disabilities together — not simply the existence of two diagnoses — must create educational needs that a single-category program cannot address.
🔬 Diagnostic Composition
- Intellectual Disability + Orthopedic Impairment — e.g., ID with cerebral palsy; both cognitive and motor needs require integrated programming
- Intellectual Disability + Autism — complex communication and behavioral needs alongside significant cognitive limitations
- ASD + Orthopedic Impairment — communication, behavioral, and physical access needs intersect
- ID + Hearing Impairment — dual communication and cognitive needs
- ID + Visual Impairment — learning media and cognitive needs that exceed single-category programming
- Genetic syndrome presentations — e.g., Down Syndrome with cardiac conditions; Angelman Syndrome; Rett Syndrome; 22q11 deletion
- Note: Many students with SLD + ADHD, or ASD + ADHD, are classified under a single primary category — Multiple Disabilities is typically reserved for combinations with particularly intensive, complex combined needs
✅ Testing Domain Overview
- Comprehensive cognitive assessment (adapted for all disabilities present)
- Adaptive behavior assessment across all domains
- Each relevant impairment-specific evaluation (OT, PT, SLP, vision, hearing as applicable)
- Communication assessment / AAC evaluation
- Assistive technology evaluation
- Behavioral assessment and Functional Behavior Assessment
- Medical records from all treating providers
- Extended School Year (ESY) criteria evaluation
📋 Recommended Assessment Instruments
| Assessment | What It Measures | Relevance to Multiple Disabilities |
|---|---|---|
| WISC-V (adapted) or Leiter-3 or UNIT-2 | Cognitive assessment adapted for sensory and motor limitations | Nonverbal or adapted cognitive instruments often required; standard administration may be invalid |
| Vineland-3 | Adaptive behavior — Communication, Daily Living Skills, Socialization, Motor | Primary functional measure; adaptive behavior often more meaningful than cognitive scores for program planning |
| Communication Matrix | Communication level and function from pre-intentional to formal symbolic | Assesses communication across modalities for students with complex communication needs |
| BASC-3 | Behavioral and emotional functioning | Behavioral assessment informs Behavior Intervention Plan (BIP) development |
| FBA (Functional Behavior Assessment) | Function of challenging behavior; antecedents, behaviors, consequences | Required basis for BIP; particularly important when behavioral needs are part of the complex profile |
| OT Evaluation (BOT-2, Beery VMI, ETCH) | Fine motor, visual-motor, handwriting, sensory processing, self-care | Occupational therapy assessment addresses daily living and school task participation |
| PT Evaluation (PDMS-3, BOT-2, SFA) | Gross motor, functional mobility, school participation | Physical therapy assessment needed when orthopedic or neuromotor disabilities are part of the profile |
| AT Evaluation | AAC devices, access technology, positioning, computer access | Comprehensive AT evaluation is typically essential for students with Multiple Disabilities |
🚩 Red Flags That May Warrant Evaluation
- Student classified under a single disability category whose educational needs consistently exceed what that program can address
- Known genetic syndrome with multiple associated conditions that have not all been assessed by the school team
- Student with two or more documented disabilities from outside providers with no school evaluation under Multiple Disabilities category
- AT needs (AAC, alternative access) that have not been comprehensively evaluated
- Adaptive behavior significantly below peers across multiple domains with programming focused only on one disability
- Communication system not matched to student's actual communication level and modalities
- Absence of an Extended School Year (ESY) determination for a student with complex, significant needs who may regress over breaks
📝 Sample Evaluation Request Language — Multiple Disabilities
"I am requesting a comprehensive evaluation for my child, [Name], to determine whether they qualify for special education services under the Multiple Disabilities category. My child has documented diagnoses of [list disabilities from outside providers], and I am concerned that the combination of these conditions is creating educational needs that cannot be fully addressed within a program designed for any single disability. I am requesting a comprehensive evaluation including cognitive assessment adapted for my child's disability profile, adaptive behavior assessment, functional communication assessment, occupational and/or physical therapy evaluation as applicable, assistive technology evaluation, behavioral assessment, and review of records from outside medical and therapeutic providers. I request written confirmation of the evaluation timeline under IDEA and NY Part 200."
Note: This language is provided as an informational starting point only and does not constitute legal advice.
Reference
Quick Reference: All 13 IDEA Categories at a Glance
Summary of eligibility requirements and key evaluation considerations
| Category | Abbreviation | Core Criterion | Key Assessments |
|---|---|---|---|
| Specific Learning Disability | SLD | Disorder in psychological processes; imperfect ability to listen, speak, read, write, spell, or do math; not due to other primary disability | WISC-V, CTOPP-2, WIAT-4, TOWRE-2, GORT-5 |
| Other Health Impairment | OHI | Limited strength, vitality, or alertness due to chronic/acute health problem (incl. ADHD) adversely affecting educational performance | Conners-3, BRIEF-2, BASC-3, WISC-V, WIAT-4 |
| Autism Spectrum Disorder | ASD | Developmental disability affecting social communication and behavior; generally evident before age 3 | ADOS-2, ADI-R, CELF-5, Vineland-3, WISC-V |
| Emotional Disturbance | ED | Characteristics over long period and to a marked degree: inability to learn, relationship difficulties, inappropriate behavior, depression, physical symptoms/fears | BASC-3, MASC-2, CDI-2, FBA, WISC-V, WIAT-4 |
| Intellectual Disability | ID | Significantly subaverage intellectual functioning concurrent with adaptive behavior deficits, during developmental period | WISC-V or Leiter-3, Vineland-3, ABAS-3, WIAT-4 |
| Developmental Delay | DD | Ages 3–9 (NY: 3–8); delays in physical, cognitive, communication, social-emotional, or adaptive development | Bayley-4, WPPSI-IV, PLS-5, PDMS-3, Vineland-3 |
| Speech or Language Impairment | SLI | Communication disorder (articulation, fluency, voice, or language) adversely affecting educational performance | CELF-5, GFTA-3, CTOPP-2, Language Sample, Audiogram |
| Visual Impairment Including Blindness | VI | Vision impairment that, even with correction, adversely affects educational performance; includes partial sight and blindness | Clinical Eye Exam, FVA, LMA, TVPS-4, O&M Assessment |
| Hearing Impairment Including Deafness | HI | Hearing impairment (permanent or fluctuating) adversely affecting educational performance; deafness included | Pure Tone Audiogram, Tympanometry, SCAN-3, CELF-5 |
| Orthopedic Impairment | OI | Severe orthopedic impairment (congenital, disease, or other cause) adversely affecting educational performance | BOT-2 (adapted), SFA, ETCH, Beery VMI, AT Evaluation |
| Traumatic Brain Injury | TBI | Acquired injury from external physical force causing functional disability or psychosocial impairment adversely affecting education; not congenital or degenerative | WISC-V, CVLT-C, D-KEFS, BRIEF-2, CPT-3, BASC-3 |
| Deaf-Blindness | DB | Combined hearing and vision impairments creating needs that cannot be accommodated in single-sensory programs | FVA, Audiogram, Callier-Azusa, Communication Matrix, Vineland-3 |
| Multiple Disabilities | MD | Concomitant impairments creating severe educational needs that cannot be accommodated in a program for one impairment (excludes deaf-blindness) | Adapted cognitive, Vineland-3, FBA, AT Evaluation, OT/PT, Communication Matrix |
Remember: Two criteria must BOTH be met for IDEA eligibility in every category: (1) the child must have a qualifying disability, AND (2) that disability must adversely affect educational performance. The presence of a diagnosis alone is not sufficient for eligibility — the IEP Team (called the CSE in New York State) must also find that the condition is having an adverse educational impact requiring specially designed instruction.
Federal vs. State Terminology
How Federal IDEA Categories Map to State Terminology
States may use different names for the same federal category. The 13 IDEA categories are defined in federal law (34 CFR §300.8) and apply in all 50 states.
⚖️ Federal Requirement (All States): All 50 states must recognize the 13 IDEA disability categories as defined in 34 CFR §300.8. States may use different terminology in their own regulations, but the underlying federal category remains the same.
| Federal IDEA Category (34 CFR §300.8) | Common State Variations | Notes |
|---|---|---|
| Specific Learning Disability | Learning Disability (NY, many states); Reading Disability; Academic Learning Disability | Dyslexia, dysgraphia, dyscalculia all fall within this category at the federal level |
| Emotional Disturbance | Emotional Behavioral Disorder (EBD) — used in many states; Serious Emotional Disturbance (SED); Emotional/Behavioral Disorder | NY uses "Emotional Disturbance." Other states (e.g., Minnesota) use "Emotional Behavioral Disorder." Same federal category. |
| Intellectual Disability | Cognitive Disability; Intellectual/Developmental Disability; Mental Retardation (older term, largely phased out) | Rosa's Law (2010) replaced "mental retardation" with "intellectual disability" in federal law |
| Speech or Language Impairment | Communication Disorder; Speech-Language Impairment; Language Impairment | Terminology varies by state; federal definition is broad |
| Autism | Autism Spectrum Disorder (ASD); Autistic-Like Behaviors (some older state regs) | Broadened over time; most states now align with ASD language |
| Other Health Impairment (OHI) | Other Health Impaired; Health Impairment | ADHD is most commonly served under OHI; broad category including chronic/acute health conditions |
| Developmental Delay | Preschool Student with a Disability (NY, ages 3–5); Early Childhood Special Education; Developmental Delay | States define the age range (federally ages 3–9). NY's "Preschool Student with a Disability" is a state-specific classification for ages 3–5. |
| Multiple Disabilities | Multiple Impairments; Multiply Disabled | Requires two or more simultaneous impairments (not deaf-blindness) |
| Hearing Impairment | Hard of Hearing; Hearing Loss | Distinct from Deafness category; covers less severe hearing loss |
| Deafness | Deaf; Profound Hearing Loss | Federal law defines deafness and hearing impairment as separate categories |
| Visual Impairment including Blindness | Visual Disability; Blind/Visually Impaired (B/VI) | Includes both partial sight and blindness |
| Deaf-Blindness | Dual Sensory Impairment; Combined Vision and Hearing Loss | Concomitant hearing and visual impairments; separate from Multiple Disabilities |
| Traumatic Brain Injury (TBI) | Acquired Brain Injury (some states); TBI | Caused by an external physical force; does not include congenital or degenerative conditions |
| Orthopedic Impairment | Physical Disability; Physical Impairment; Physically Disabled | Includes congenital anomalies, disease, and other causes |
📍 New York State: New York uses "Preschool Student with a Disability" (PSWD) as a state-specific category for children ages 3–5, governed by Part 200 Regulations. New York also uses "Learning Disability" where federal law uses "Specific Learning Disability," and "Emotional Disturbance" which aligns with the federal category of the same name. NY's Committee on Special Education (CSE) or Committee on Preschool Special Education (CPSE) makes eligibility determinations under state and federal law.
📋 About This Guide: This resource provides educational information about special education law. State terminology and procedures vary. This is not legal advice. Families with legal questions should consult a qualified special education attorney in their state. Educational advocacy and informational support only.