This open access book offers a comprehensive analysis of the limitations inherent in current mental health care models, including the challenges of oppositional tolerance in psychotropic medications and the “time on task” problem in psychotherapy. The author introduces psychoeducation as a scalable and practical alternative, emphasizing its potential to deliver mental health skills to broad populations through established educational systems. The book explores the fundamental differences between psychotherapy and psychoeducation, highlighting the active, learner-centered approach of psychoeducation and its compatibility with academic curricula from early childhood through higher education. Drawing on research from diverse settings, the author reviews evidence for the effectiveness of psychoeducational interventions and proposes a taxonomy of psychological skills essential for mental health. This volume will be of interest to scholars and students in public health, psychology, psychiatry, education, and social work, as well as policymakers and practitioners seeking innovative strategies to address mental health at scale. By integrating original frameworks and practical recommendations, this book provides a timely and thought-provoking contribution to the literature on mental health promotion and intervention.