This book provides school-based teams with everything they need to implement the research-proven Prevent-Teach-Reinforce model to address serious behavior problems in school. Prevent-Teach-Reinforce (PTR) is a practical model for addressing serious behavior problems in school settings. Designed for use by school-based teams, the model has been shown in rigorous efficacy research to be effective in reducing behavior problems and increasing social skills and academic engaged time. The model's operations are based on detailed and explicit steps and guidelines, and they address three core components: preventing behavior problems from occurring by adjusting the student's curriculum and social and physical environment, teaching proactive communication skills to replace behavior problems, and reinforcing prosocial behavior and academic achievement. This easy-to-use book provides school-based teams with the specific guidelines and the numerous forms and tools needed to implement the PTR model.