An overview is presented of the Concerns-Based Adoption Model, which describes the major factors influencing the decisions and actions of individuals in the innovation adoption process. The two critical indicators hypothesized by the model, Level of Use of the Innovation, and Stages of Concern About the Innovation, are discussed. The seven stages of concern (awareness, informational, personal, management, consequence, collaboration, and refocusing) are described. Excerpts from the Levels of Use chart provide a guide to the process of adapting an innovation: nonuse, orientation, preparation, mechanical use, routine, refinement, integration, and renewal. The relationship between the two indicators is examined using a case study approach to investigate the ways in which the concerns of individuals related to their use or nonuse of educational innovations. Two specific research studies are described: a study of the adoption of team teaching at the public school level, and a study of the use of instructional modules in two universities. (JD)