The University of Colorado developed a modular undergraduate educational psychology program. Its objective was to teach concepts critical to effective teaching in a manner consistent with the flexible scheduling of the new secondary teacher education program. Researchers isolated 12 basic topics and surveyed relevant literature. Some 27 modules were created, each having a title page, a statement of behavioral objectives and rationale, a learning sequence, probing questions, and two learning checks for each section. Objective tests were used since they provided rapid feedback. A prerequisite/optional dichotomy was utilized with core modules required early in the sequence and others being covered as the need arose. Seventy-five titles were acquired for a library-type classroom; also, a student manual, and evaluation form, a record-keeping system, and a management manual were created. The program met its objectives, for student achievement was high and the costs low. Future versions will use a diagnostic-prescriptive basis; modules will be added, more emphasis will be placed upon applied skills, subjective assessment used for optional modules, and more student-teacher interactions provided. (PB)