This report describes the conceptualization and planning for the Center for the Study of Learning at Northern Illinois University. The center's mission is to provide an institutional setting for the discovery, synthesis, and dissemination of knowledge about learning in three subject areas: mathematics, sciences, and social studies. The report first describes the original planning for the project. The paper then outlines 13 specific research and development projects designed to further construction and application of a theory of knowledge representation in the 3 subject areas. The activities, governance, resources, and evaluation plan for the center are covered next. The report then clarifies the center's eight project goals: (1) studying the learning process, (2) involving practitioners, (3) developing instructional materials, (4) influencing policy, (5) considering the needs of handicapped learners, (6) studying learning issues affecting minorities, (7) collaborating with other centers, and (8) disseminating research results and materials. The report concludes with a review of the center's program; its strategies for research, development, dissemination, and collaboration; and its long range plans. Appended to the report is "Knowledge Representation: A Foundation for Educational Research and Practice," a paper clarifying the theoretical base for the center's work. Twenty-eight references are cited. (PGD)