The School Improvement Through Instructional Process (SITIP) Program, initiated in Maryland in 1980, was concerned with improving classroom and school activities through the application of process-product research on classroom and school effectiveness. All 24 local education agencies voluntarily implemented one or more of four research-based instructional improvement models: Active Teaching, Mastery Learning, Student Team Learning, and Teaching Variables. They were assisted in their efforts by the Maryland State Department of Education, and both local and state staff were encouraged to design and carry out their tasks in ways suggested by the research on planned change. To facilitate data-based decision-making with respect to SITIP, evaluation was conducted and three major reports were developed: the first focused on implementation, the second on impact, and the present report focuses on institutionalization. The report begins with an overview of SITIP, and discusses evaluation, state initiatives, and local implementation. The final chapter presents a summary and conclusions. (JD)