Attention Deficit Hyperactivity Disorder (ADHD) affects around 5 per cent of school-age children. Its symptoms include abnormally high levels of hyperactivity, inattentiveness, and disruptive behaviour. "Understanding ADHD" is a comprehensive, concise, and clearly written appraisal of the conditions, symptoms, and possible treatments. It also looks at how some behavioural patterns can be misdiagnosed as ADHD, the critical importance of early diagnosis and treatment, how the condition can affect a child"s psychological and social situation, and what parents, carers, and teachers can do to address the condition effectively.