Multimodal treatment concepts for ADHD are fundamentally based not only on psychotherapeutic interventions and medication but also on targeted and systematic psychoeducation. This helps to better understand and address the complexity of ADHD and the risks of comorbidity. The manual outlines a structured group training program for adolescents and young adults with ADHD, in the context of current medical, psychological, and educational knowledge. It provides detailed information on symptoms, diagnostics, and therapy, as well as strategies for coping with functional impairments. The sessions are structured to first provide insight into the manifestations and issues of ADHD, covering topics such as pathogenesis and comorbidity, risk behavior, and the course of the disorder.