Classroom management and what teachers can do to make it possible for children to behave better, which permits learning to occur, are the subjects of this handbook. The authors hypothesize that the first step toward better classroom management is a teacher's recognition that how children behave is largely determined by the teacher's behavior. When teachers employ operant conditioning they systematically use rewarding principles to strengthen children's suitable behavior. Ignoring unsuitable behavior will discourage its continuance. Behavior can be changed by three methods: (1) Reward appropriate behavior and withdraw rewards following inappropriage behavior, (2) Strengthen the rewards if the first method is unsuccessful, and (3) Punish inappropriate behavior while rewarding appropriate behavior if methods (1) and (2) fail. The booklet explains each method and offers supporting research and evaluations of the use of different methods. It outlines step-by-step procedures and has appeal for parents, teachers, and anyone involved in training children. (DO)