An on-line information system was designed and implemented in an elementary school using a time-sharing DEC-15 computer system to facilitate the management of individualized instruction. The system stores students' background information, test data, and instructional tasks. Teachers and researchers were able to retrieve desired data using either the standardized reports or the flexible QUERY program. The paper emphasizes how the data base structure contributes to retrieval speed and output format flexibility, and how the organization of the system facilitates data base updating and student data utilization for monitoring student programs. (Author/SK)