ADHD is a chronic disorder characterized by difficulties with attention, impulse control, and hyperactivity. It affects approximately 3-5% of school-aged children. The causes are unknown but may include genetics, brain injury, environmental factors, and prenatal influences. The three main symptoms are inattention, hyperactivity, and impulsivity. Treatment involves medication and behavior therapy to help manage symptoms. While medication is often used, it is not always the best option for every child with ADHD. Proper classroom environments and teaching strategies can also help students with ADHD succeed.