From foremost authority Russell A. Barkley, this book presents essential principles and practices for managing attention-deficit/hyperactivity disorder (ADHD) in children and teens. Barkley interweaves the best scientific knowledge with lessons learned from decades of clinical practice and research. He provides guidelines and clinical tips for conducting thorough, accurate assessments and developing and implementing science-based treatment plans. The book is grounded in Barkley's theory of ADHD as a disorder of executive functioning and self-regulation. Ways to collaborate successfully with parents and other professionals are highlighted throughout. In a convenient large-size format, the volume includes 46 reproducible handouts and forms that can be downloaded and printed for repeated use.