The IRIS STAR Legacy modules cover topics relevant to future teachers, administrators, and other school personnel. The modules include a challenge, interactive activities, and multiple opportunities for sharing and assessment utilizing the web and CD technology. This module—a revision of Who’s In Charge? Developing a Comprehensive Behavior Management System—highlights the importance of establishing a comprehensive classroom behavior management system composed of a statement of purpose, rules, procedures, consequences, and an action plan. It also provides information about how culture, classroom factors, and teacher actions can influence student behavior.