This document provides information about ADHD (Attention Deficit Hyperactivity Disorder), including: - It describes the three main types of ADHD: predominantly inattentive, predominantly hyperactive-impulsive, and combined type. - Boys are more likely to be diagnosed with ADHD than girls. Girls with ADHD often present as inattentive. - Signs of ADHD in young children include inattention, hyperactivity, and impulsivity. - Current treatments include medication, therapy, behavior modification, and exercise, but a combination is most effective. Medications help with concentration, impulse control, and calmness.