Wyoming Special Education Eligibility Categories and the Severe Discrepancy Formula

Your child has been evaluated. Now the district is telling you whether they qualify for special education services. This decision — the eligibility determination — is one of the highest-stakes moments in the entire process. And in Wyoming, it is governed by rules that differ in important ways from how other states apply federal law.

Understanding the eligibility categories and the specific criteria Wyoming uses to determine qualification gives you the knowledge to push back when a determination seems wrong.

The 13 Federal Disability Categories Wyoming Recognizes

Under IDEA and Wyoming's Chapter 7 Rules, a child may be eligible for special education if they meet the criteria for one or more of the following disability categories and, because of that disability, need specially designed instruction:

1. Autism
2. Deaf-Blindness
3. Deafness
4. Developmental Delay (for children ages 3-9 only)
5. Emotional Disturbance
6. Hearing Impairment
7. Intellectual Disability
8. Multiple Disabilities
9. Orthopedic Impairment
10. Other Health Impairment (includes ADHD, chronic health conditions affecting educational performance)
11. Specific Learning Disability
12. Speech or Language Impairment
13. Traumatic Brain Injury
14. Visual Impairment Including Blindness

Two-part test applies to every category: the child must both meet the criteria for the disability category and demonstrate that the disability adversely affects educational performance to the degree that specialized instruction is needed. A medical diagnosis alone does not automatically qualify a child for special education.

How Wyoming Determines Specific Learning Disability Eligibility

Specific Learning Disability (SLD) is the most commonly identified category nationally, and it carries Wyoming-specific eligibility criteria that parents must understand.

Wyoming allows districts to use two approaches to determine SLD eligibility:

The Severe Discrepancy Formula: This is Wyoming's traditional method. It uses a statistical comparison between a student's measured intellectual ability (typically an IQ score) and their measured academic achievement in areas like reading, writing, or math. If there is a significant gap — a "severe discrepancy" — between what the student is intellectually capable of achieving and what they are actually achieving, they may qualify under the SLD category.

The problem with this approach is the "wait to fail" dynamic. A young child cannot show a statistically significant discrepancy until the gap between ability and achievement has widened considerably — which usually means years of struggling before they qualify. Critics of this method argue it delays necessary intervention.

The Alternative Research-Based Approach: Wyoming also permits districts to use a process based on the student's response to high-quality instruction (sometimes called Response to Intervention or RTI) to identify SLD. Under this approach, the district examines whether the student responds adequately to scientific, research-based instruction delivered with fidelity.

A critical point: WDE guidance and federal case law are explicit that RTI or MTSS processes cannot be used to delay or deny a formal evaluation request. If a parent requests an evaluation, the 60-day timeline must begin immediately — the district cannot tell you to wait through another round of Tier 2 interventions first.

What Must Be Included in a Wyoming Eligibility Determination

A Wyoming eligibility determination is made by a multidisciplinary team that includes you as the parent. The team must review a variety of assessment data — not just a single test score. Relying on one standardized test to determine eligibility or ineligibility is prohibited under Chapter 7.

Required data sources include:

• Standardized cognitive and academic achievement assessments
• Observations of the child in the classroom by a qualified professional
• Information provided by the parents about the child's development and functioning
• Information from teachers about the child's academic performance
• Review of any relevant medical or health records provided by the family

The team must also rule out other causes for the academic difficulty: limited English proficiency, lack of appropriate instruction in reading or math, and environmental or economic disadvantage. If a child has not had access to quality instruction, that factor alone cannot be the reason for eligibility — but it must be considered in the analysis.

When Wyoming Says Your Child Doesn't Qualify

Eligibility denial is a high-frequency trigger for advocacy. Districts sometimes use narrow interpretations of state criteria — including rigid applications of the severe discrepancy formula — to avoid determining a child eligible for services.

If your child was found ineligible and you believe the determination is wrong, you have several options:

Request Prior Written Notice. Before you leave the meeting or within a few days of receiving the eligibility determination, send a written request asking the district to provide Prior Written Notice explaining why the team determined your child ineligible, what data was considered, what other options were considered and rejected, and what factors influenced the decision. This PWN is a legal document that can be submitted as evidence in a state complaint.

Request an Independent Educational Evaluation (IEE) at public expense. If you disagree with the school's evaluation that led to the ineligibility finding, you have the right to request that the district fund an evaluation by a qualified examiner who is not employed by the district. The district must either agree to fund the IEE or file a due process complaint to defend its own evaluation.

File a WDE State Complaint. If the district violated Chapter 7 procedures during the evaluation process — missed the 60-day timeline, used only a single test, failed to include parental input, or applied eligibility criteria inconsistently — those are grounds for a state complaint.

The "Other Health Impairment" Category and ADHD

Many Wyoming families whose children have ADHD are surprised to learn that ADHD does not have its own disability category. ADHD is typically evaluated under the "Other Health Impairment" (OHI) category, which covers chronic or acute health conditions that adversely affect educational performance due to limited alertness, vitality, or alertness (including heightened alertness to environmental stimuli that reduces alertness in the educational environment).

To qualify under OHI for ADHD, the team must document that the ADHD adversely affects educational performance and that the student requires specially designed instruction. If a student with ADHD is struggling but "getting by" with minor accommodations, the district may argue they do not need special education — in which case a Section 504 plan may be the more appropriate mechanism.

If your child was denied special education eligibility under any category and you believe the denial was improper, the Wyoming IEP & 504 Advocacy Playbook includes the specific letter templates and Chapter 7 citations you need to formally challenge that decision.

See more United States guides →