A clearinghouse on mastery learning (CML) has been established at Loyola University (New Orleans, Louisiana) to accommodate the informational needs of mastery learning researchers, practitioners, and policymakers. Manual and computer searches on this topic have been conducted in the following databases: ERIC, Education Index, Psychological Abstracts, Comprehensive Dissertation Abstracts, and Conference Papers Index. Also included are monographs, technical reports, and books pertaining broadly to instructional psychology, but with sections or chapters focusing on mastery learning. The resulting bibliography has approximately 1,000 citations, cataloged in accordance with the American Psychological Association's format for bibliographic citations. The computer-printed alphabetical list will be updated on a biannual basis, once every spring and fall. The bibliography is followed by a progress report on the Loyola clearinghouse entitled "Managing the Proliferation of the Mastery Learning Literature," by Glenn M. Hymel. It assesses the progress of the clearinghouse in meeting its objectives as an information management system, a central repository, an analysis procedure, a source of information analysis products, and an informational network system. (TE)