ABSTRACT : The purpose of this article is to introduce reactive behavior-management techniques that take into consideration the functions of behavior (i.e., the reasons why students engage in inappropriate behaviors). Following is an introduction to some of the basic principles of behavior analysis, the foundational theory on which this approach to behavior management is based; a discussion of the causes of student misbehavior; a description of how teachers can determine the actual cause of misbehavior; and strategies to reduce these inappropriate behaviors. It is important to implement proactive management strategies the physical education to attempt to prevent misbehavior from occurring; this will greatly and positively impact the success of the teaching environment. It is important to treat each situation, each behavior, and each student uniquely and to implement consequences to the function of the behavior. The success of a teacher's behavior-management strategy may depend on this individuality.