Emotional Disturbance — What IDEA and Section 504 Mean for Schools and Families Emotional Disturbance (ED) is an IDEA disability category with important implications for identification, evaluation, services, and civil‑rights protections.  This article explains how ED is defined under IDEA and Section 504 , how a child qualifies, the referral and evaluation process, common supports (accommodations, modifications, related services), practical classroom and behavioral strategies, and the procedural protections and entitlements for parents. Legal Definitions and Framework IDEA: “Emotional disturbance” (ED) is a statutorily listed category under IDEA.  Typical regulatory language describes ED as a condition exhibiting one or more specific emotional/behavioral characteristics (e.g., inability to learn not explained by intellectual, sensory, or health factors; inability to build/maintain interpersonal relationships; inappropriate behaviors/feelings under normal circumstances; pervas...