Self-monitoring is a key life skill that can be beneficial for everyone--especially children struggling with behavior challenges--to learn and improve. This practical manual presents the Self-Monitoring And Regulation Training Strategy (SMARTS), a motivating and engaging Tier 2 or 3 behavior support program for grades K–5. The authors are prominent experts who explain the conceptual and empirical rationale for SMARTS and provide everything needed for implementation. Unlike traditional interventions that rely solely on teacher assessments, SMARTS actively involves students in their own behavioral improvement process, reinforcing their sense of agency and competence. In a convenient large-size format, the book includes a structured yet flexible curriculum and numerous reproducible tools, which also can be downloaded and printed at the companion website. This book is in The Guilford Practical Intervention in the Schools Series, edited by Sandra M. Chafouleas.