This learning module has been designed to aid the teacher trainee in identifying ways in which he influences student behavior in the classroom and also explores means of selecting more meaningful reinforcers and their application. Terminal objectives of the module are the ability to (1) define the terms "reinforcement,""positive reinforcement,""negative reinforcement,""punishment," and "extinction"; (2) state five principles of reinforcement; and (3) describe a strategy for selecting an appropriate reinforcer for a specific learning task for a student in the teacher's classroom. Included in the module are pre- and post-test forms, a handout on principles of reinforcement, and a suggested reading list of appropriate references. (MB)