Focused on the impact of the institute program for inservice teachers sponsored by the National Science Foundation, this report summarizes the findings of 138 documents (research and evaluation studies). Documents reviewed were grouped into dissertations and theses (63), journal articles (41), interim or final reports (23), papers presented at professional meetings (9), and books (2). Information contained in these documents was summarized in terms of six subcategories: Characteristics of Participants, Subject Matter Competence, Teacher Attitudes, Teaching Behavior, Understanding of Science, and Career Effects. Examples of studies fitting into each of these categories were selected for illustrative purposes. In addition to the discussion provided for each of the subcategories, a four-page summarization is also included. (PEB)