This directory is an update of an earlier listing of the projects funded by the Office of Educational Research and Improvement (OERI) in the U.S. Department of Education that was issued in February 1988. It includes the addresses, telephone numbers, mission statements, major activities, and key staff of the regional educational laboratories, the national research and development centers, the ERIC clearinghouses, the National Assessment of Educational Progress, the National Education Longitudinal Study of 1988, and the National Diffusion Network (NDN) State Facilitators (A total of 49 entries). Also included are the OERI project officers monitoring the projects for the Federal Government. Updated information presented in this edition includes new titles for several projects, some staff changes, and the NDN information. (EW)