This document provides an overview of Attention Deficit Hyperactivity Disorder (ADHD) including its history, challenges it presents, assessment and diagnosis, educational services, characteristics, causes, and teaching strategies. It discusses how ADHD is defined under IDEA and can qualify students for special education services. Common challenges for students with ADHD include failing school, dropping out, and difficulties with family, peers, and teachers. Effective teaching strategies include structured environments, rewards, interest-based assignments, and self-management plans.