This document provides an overview of the theory of behaviorism. It defines behaviorism as the view that psychology should only study observable behaviors and not internal mental states. It describes the three types of behaviorism: methodological, psychological, and analytical/logical behaviorism. Key figures discussed are B.F. Skinner, known for operant conditioning, and Ivan Pavlov, known for classical conditioning. The document also outlines how behaviorism could be applied in a classroom setting through the use of reinforcement, punishment, and extinction to modify student behavior.