This document provides an overview of behaviorism and key behaviorist theorists including Ivan Pavlov, E.L. Thorndike, and B.F. Skinner. It discusses classical and operant conditioning, defining behaviorism as the study of observable behavior and excluding internal mental states. Classical conditioning involves associating a neutral stimulus with an unconditioned stimulus to elicit a response, while operant conditioning examines how behavior is influenced by consequences like reinforcement and punishment. The document also outlines strategies from applied behavior analysis for increasing desirable behaviors and decreasing undesirable behaviors in educational settings.