The document defines emotional disturbance under IDEA and Section 504. IDEA defines emotional disturbance as exhibiting one or more characteristics, such as an inability to learn not due to other factors, an inability to build relationships, inappropriate behavior/feelings, unhappiness/depression, or physical symptoms due to personal or school problems. Section 504 defines a disability as a physical or mental impairment limiting major life activities. Colorado law defines a significant identifiable emotional disability as emotional/social functioning preventing reasonable education benefit, demonstrated by characteristics like sadness/depression, withdrawal, or aggression. The document compares federal IDEA characteristics of emotional disturbance to Colorado's indicators.