Delaware Special Education Eligibility Categories Explained

Before a child can receive an IEP in Delaware, the evaluation team must determine two things: whether the child has a disability that falls into one of the recognized eligibility categories, and whether that disability has an adverse effect on educational performance that requires specially designed instruction. Both elements must be present. A diagnosis alone does not automatically create IEP eligibility — and a child struggling in school without a qualifying disability category does not either.

Understanding the categories Delaware uses, and what the evaluation team has to demonstrate for each one, is critical for parents navigating the eligibility process.

Delaware's Framework for Eligibility

Delaware's eligibility categories are governed by 14 DE Admin. Code 925 and mirror the thirteen disability categories under the federal IDEA, with one important addition for young children. The state's determination process requires a multidisciplinary team — which in Delaware must include a certified school psychologist for initial evaluations — to review evaluation data and determine both category membership and educational impact.

The "adverse effect" standard is not simply "the child is struggling." It means the disability is causing a measurable negative impact on the child's ability to access and progress in the general education curriculum, or for preschool children, to participate in appropriate activities. A child with ADHD who is performing at grade level with no accommodation may have a diagnosis but may not meet Delaware's eligibility standard for an IEP under that category.

The Eligibility Categories Under Delaware Law

Autism

Delaware defines Autism as a developmental disability significantly affecting verbal and nonverbal communication and social interaction, generally evident before age 3, that adversely affects educational performance. Delaware specifically requires documentation that the adverse effect cannot be primarily explained by an emotional disability or an intellectual disability. Children with autism may also qualify under other categories if autism is not the primary disability affecting education.

Delaware's Autism eligibility count — approximately 1,762 school-age students, representing 8.5 percent of the special education population — reflects both traditional autism diagnoses and the broader autism spectrum. The Delaware Autism Program, which serves students with more significant support needs, operates specialized settings including the Brennen School in Wilmington.

Deaf-Blindness

Concomitant hearing and visual impairments so severe that the student cannot be accommodated in programs solely for deaf or blind students. Delaware requires documentation of both sensory impairments and their combined educational impact.

Deafness

A hearing impairment so severe that the child is impaired in processing linguistic information through hearing, with or without amplification, that adversely affects educational performance.

Developmental Delay

This is Delaware's most important category for young children, and one of its most distinctive. Delaware permits the Developmental Delay category for children from age 3 through their ninth birthday. A child qualifies when they exhibit a delay in one or more of five developmental areas: physical, cognitive, communication, social-emotional, or adaptive development.

The Developmental Delay category exists precisely because early childhood professionals often cannot pin down a specific disability in a young child. It provides a legal pathway to services without requiring a definitive, potentially stigmatizing label. At age 9, the team must determine whether the child continues to meet eligibility under one of the other categories or whether they no longer require special education.

Emotional Disturbance (ED)

One or more of five characteristics exhibited over a long period and to a marked degree that adversely affects educational performance: an inability to learn not explained by intellectual, sensory, or health factors; inability to build or maintain satisfactory interpersonal relationships; inappropriate behaviors 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. Delaware's ED category explicitly includes schizophrenia and excludes social maladjustment without an emotional disturbance.

ED is one of the most contentious eligibility categories in Delaware. Districts sometimes attempt to categorize children with complex trauma histories as having conduct disorders (social maladjustment) rather than emotional disturbances to avoid eligibility — a distinction that must be based on evaluation data, not administrative convenience.

Hearing Impairment

An impairment in hearing, whether permanent or fluctuating, that adversely affects educational performance but is not included under Deafness.

Intellectual Disability (ID)

Significantly subaverage general intellectual functioning, existing concurrently with deficits in adaptive behavior, manifested during the developmental period, that adversely affects educational performance. Delaware's identification count includes approximately 1,558 school-age students with ID.

Multiple Disabilities

Simultaneous impairments whose combination causes such severe educational needs that the student cannot be accommodated in a special education program designed solely for one of the impairments. The category excludes Deaf-Blindness.

Orthopedic Impairment

A severe orthopedic impairment that adversely affects educational performance. Includes impairments caused by a congenital anomaly, disease, or other causes.

Other Health Impairment (OHI)

This is Delaware's second-largest eligibility category, covering approximately 2,833 school-age students. OHI covers conditions including ADHD, heart conditions, tuberculosis, rheumatic fever, nephritis, asthma, sickle cell anemia, hemophilia, epilepsy, lead poisoning, leukemia, and diabetes. The key is that the health impairment limits the child's strength, vitality, or alertness — including a heightened alertness to environmental stimuli that results in limited alertness to the educational environment — and thereby adversely affects educational performance.

ADHD is most commonly served under OHI in Delaware. However, a student with ADHD who does not qualify for OHI (because the disability does not adversely affect educational performance) may still qualify for a 504 Plan.

Specific Learning Disability (SLD)

Delaware's largest eligibility category, accounting for approximately 47.7 percent of the special education population (about 9,826 students). SLD covers a disorder in one or more of the basic psychological processes involved in understanding or using language, spoken or written, including dyslexia, dyscalculia, and dysgraphia. The category excludes learning problems primarily resulting from visual, hearing, motor, intellectual, emotional, cultural, environmental, or economic disadvantage.

Under 14 DE Admin. Code 925, Delaware permits two pathways for SLD identification: the Response to Intervention (RTI) model, where insufficient progress despite research-based intervention supports eligibility, and the pattern of strengths and weaknesses model, which looks at discrepancies between cognitive ability and academic achievement.

Speech or Language Impairment

A communication disorder such as stuttering, impaired articulation, language impairment, or voice impairment that adversely affects educational performance. Delaware identifies approximately 1,755 school-age students with speech or language impairments. This category often applies to preschool children before more specific learning profiles emerge.

Traumatic Brain Injury (TBI)

An acquired injury to the brain caused by an external physical force, resulting in total or partial functional disability or psychosocial impairment. Does not include degenerative brain conditions.

Visual Impairment Including Blindness

An impairment in vision that, even with correction, adversely affects educational performance. Includes both partial sight and blindness.

Two Standards That Must Both Be Met

It bears repeating because it is where many Delaware eligibility disputes begin: meeting a disability category criterion is necessary but not sufficient for an IEP. The team must also document that the disability adversely affects educational performance.

Parents sometimes encounter districts that acknowledge a diagnosis but refuse eligibility by arguing there is no adverse educational effect. This argument requires data — it cannot be based on the student's current grades alone. A student may be passing classes while spending twice as long on homework, relying entirely on parent support, or experiencing significant anxiety and stress that is not visible in the classroom. Educational performance includes participation, attendance, behavior, and functional skills, not just letter grades.

If you believe your child has a qualifying disability but the district is denying eligibility based on an insufficient adverse effect analysis, request an Independent Educational Evaluation (IEE) under 14 DE Admin. Code 926. A private evaluator's conclusions about educational impact can be brought to the eligibility meeting and must be considered by the team.

The Delaware IEP & 504 Blueprint walks through the eligibility determination process — including how to prepare for an eligibility meeting and how to challenge a denial that is not supported by the evaluation data.

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