Diffusion of Innovations (DOI) is a complex and intricate theory applied in a variety of contexts. This review investigates the five key attributes of innovation in DOI (relative advantage, compatibility, complexity, trialability, and observability), as well as the stages of diffusion within innovators (early adopters, early majority, late majority, and laggards). Literature is examined with the application of DOI in areas of general education, health behavior/education/promotion, physical activity, and physical education. The model lends itself well to be applied within the physical education realm, but at this point is an understudied theory within the context.