There is an interesting history in the development and evolution of the science of applied behavior analysis (ABA), and our science continues to change and evolve as does the society in which we live. In the text, Applied Behavior Analysis, Cooper et al. (2020) describe applied behavior analysis (ABA) as “a science devoted to understanding and improving human behavior” (p. 2). This course will introduce you to the basic foundation of concepts and principles that underlie the science and goals of ABA.