Hyperactivity is a chronic disorder which accounts for almost 50% of the consultations carried out within child and adolescent psychiatry. It is also possibly one of the disorders that has generated the most attention, caused the most concern and been a subject of study for many years among educators, parents and specialists. This disorder interferes in many areas of normal functioning and is responsible for a multitude of disturbances and difficulties that seriously affect evolutionary development, schooling and the social and family life of the children and adolescents who suffer from it. In 50% to 80% of cases hyperactivity persists in adulthood. This didactic material provides an introduction to the disorder, how to diagnose, assess and treat it. It also provides various strategies and resources for dealing with the problem. Ideaspropias Editorial has published this e-book to provide parents and educators with a set of guidelines for treatment.