Extended School Year (ESY) for Students With Intellectual Disabilities

ESY Isn't Summer School — It's a Legal Protection Against Skill Loss

Extended School Year services are special education and related services provided beyond the regular school year when the IEP team determines they're necessary for the student to receive a Free Appropriate Public Education (FAPE). ESY isn't enrichment, and it isn't optional summer programming that the district offers to all students. It's an individually determined IDEA entitlement.

For students with intellectual disabilities, ESY can protect continuity in critical learning. Regression and recoupment data can inform the decision, but IDEA does not make them a single nationwide eligibility test. The IEP team must decide individually whether ESY is necessary for the student to receive FAPE.

Students with intellectual disabilities are often among the most vulnerable to regression. Skills that took months of intensive, systematic instruction to acquire — self-care routines, communication sequences, reading decoding, math facts — can erode significantly over a summer break. And for skills that are already at the acquisition stage (not yet fluent), even a few weeks without practice can return the student to baseline.

The Criteria Schools Use — and How They Get Them Wrong

IDEA does not prescribe a single nationwide ESY eligibility test or list of factors. The IEP team must decide individually whether ESY is necessary for FAPE, and the public agency cannot limit ESY to a disability category or unilaterally cap its type, amount, or duration (34 CFR §300.106). State criteria may guide the team, but do not replace the individual FAPE decision.

Schools commonly deny ESY by:

Treating lack of prior regression as an automatic bar. The IEP team must make an individual FAPE-based decision using the available evidence. Data from earlier breaks can inform the decision, but IDEA does not require a student to have already lost skills before the team can consider ESY.

Limiting ESY to "maintenance" services. Some districts interpret ESY as services that merely prevent regression, offering a minimal program with lower hours and no new instruction. Under IDEA, ESY services must be sufficient to provide FAPE. If maintenance-only services don't prevent regression in critical skill areas, they're inadequate.

Applying blanket policies. A district that limits ESY to a certain number of weeks or hours for all students, or that only offers ESY to students in certain disability categories, is violating the individualisation requirement. ESY determinations must be made on a student-by-student basis by the IEP team.

Which Goals Should Drive ESY

Not every IEP goal requires ESY services. The IEP team should focus on goals involving:

• Critical life skills that the student cannot practise independently — self-care routines, communication, safety awareness, community navigation. These skills depend on structured instruction and often cannot be maintained through parent-provided practice alone.
• Emerging skills at the acquisition stage — skills the student is actively learning but hasn't yet mastered. A six-week break during acquisition can erase months of instruction.
• Communication goals — especially for students using AAC. Device proficiency requires daily modelling and practice. A student who is learning to use a speech-generating device and loses access to trained communication partners over summer may return in September at a pre-summer level.
• Behavioural goals where regression would compromise safety — a student who has learned to use a replacement behaviour instead of aggression may revert without consistent reinforcement.

The IEP team should collect data throughout the school year that tracks regression after shorter breaks (winter break, spring break) to predict summer regression. If the data shows significant regression after a two-week break, that's strong evidence supporting ESY.

What ESY Services Should Look Like

Effective ESY for a student with an intellectual disability isn't a watered-down version of the school-year program. It should include:

• The same specially designed instruction used during the school year, delivered by qualified staff who know the student's methodology and prompting hierarchy.
• Sufficient hours to maintain or advance critical skills. Two hours per week of group instruction may not be enough for a student who receives 25 hours per week of SDI during the school year.
• The student's AAC device and assistive technology, with staff trained to use it. ESY without the student's communication system is ESY without communication access.
• Data collection using the same measurement tools as the school year, so the IEP team can assess whether ESY services achieved their purpose.

Challenging an ESY Denial

If the IEP team denies ESY and you disagree:

1. Request Prior Written Notice explaining the denial, including what data the team used and what alternatives were considered.
2. Provide your own data — regression after previous breaks, progress monitoring showing slow recoupment, letters from private therapists or medical providers documenting the risk of skill loss.
3. Request an IEP meeting to reconsider. Bring the data and ask the team to address each factor their state's ESY criteria require.
4. If the denial stands, file a state complaint or request mediation. A categorical disability exclusion or unilateral cap conflicts with IDEA's individual determination rule; ask the team to identify the state criteria it applied.

The Intellectual Disability IEP & Placement Playbook includes a section on ESY eligibility, data collection strategies for documenting regression, and the specific arguments to make when a school applies blanket policies instead of individual analysis. Get the complete playbook.