This teachers guide in behavior modification is divided into five chapters. Chapter one, "Describing Behavior," presents methods for specifying behaviors in precise wording, labeling behavior, and deciding on the target behavior (behavior designated for modification). Chapter two, "Measuring Behavior," describes and illustrates by means of graphs how observation and recording of the target behavior produces measured results called "the baseline data." Chapter three is entitled "Understanding Behavior"; this chapter discusses at length the theory of behavior modification, respondent and operant behavior, and positive and negative reinforcers and punishment. Chapter four, "Modifying Behavior," describes various steps the teacher might take in his role as a behavior modifier in using reinforcement methods; another method that is discussed in this chapter is diagnostic/prescriptive teaching. Chapter five, "Evaluating Behavior," details means to evaluate the results of the behavior modification by expanding on the graphs described in chapter two. (JA)