Fitness education is an important component in the promotion of health-enhancing behaviors that lead to physically active lifestyles. However, using a teacher-centered approach to teach fitness may be boring and may limit the application of the content to the individual student. The personalized system of instruction (PSI) is an instructional model that may improve the personal application of fitness concepts and skills. The purpose of this article is to describe the characteristics of the PSI and how to implement the model in fitness education. (Contains 3 figures and 1 table.)