Foremost experts guide practitioners to understand and prevent violence, bullying, and peer harassment in grades K–12. Best practices are reviewed for creating a positive school climate and establishing effective security and crisis response procedures. The authors describe ways to identify and support behaviorally at-risk students across multiple tiers of intervention, beginning with universal screening. In a convenient large-size format, the book includes reproducible planning tools. Purchasers get access to a webpage where they can download and print the reproducible materials. New to This Edition *Reflects over 15 years of research advances, new initiatives, and the growth of universal prevention models. *Grounded in current positive behavioral interventions and supports (PBIS) practices; also incorporates restorative discipline, social–emotional learning, and trauma-informed practices. *State-of-the-art behavioral screening and threat assessment methods are integrated throughout. *Discussions of timely topics, including cyberbullying, the role and limitations of policing in schools, and racial/ethnic disparities in discipline. This book is in The Guilford Practical Intervention in the Schools Series, edited by Sandra M. Chafouleas.