The science of behavior has its foundation in the pioneering work of Drs. J. B. Watson, B. F. Skinner, and many others dating back to the early 1900s. Skinner focused on rate of responding, as did his students Dr. Ogden Lindsley and colleagues at the University of Kansas. It was learned that attaining a high rate of correct responding fostered retention, the ability to learn more complex skills, and other benefits. At BDS, we have developed our instructional design model based on the work of these and other researchers. In addition to our overall approach being evidence-based, we also apply a scientific approach to evaluating each module we create. The result is cost-effective and efficient learning outcomes.