To talk about the dissemination of research is to talk about the relationship between theory and practice. A body of empirical and conceptual knowledge has accumulated in an area known as the dissemination and utilization of scientific knowledge. Researchers and practitioners will interact at two points: as the knowledge base is transferred, and as practitioners communicate their needs to researchers. This paper centers on the dynamics regulating the process of transfer of knowledge from research centers to schools and teachers. A robust finding in the research utilization literature is that when researchers have used an approach to the dissemination of their results characterized as "sustained interactivity," the impact of the study on users and user organizations is pronounced. Basically, sustained interactivity involves multiple exchanges between researchers and potential users of that research at different phases of the study. To illustrate the dynamics of sustained interactivity on users and researchers, a recent vocational training research program in Switzerland, called "Education et Vie active," is described. (5 figures) (22 references) (MLF)