This pamphlet describes the purpose of the Office of Educational Research and Improvement (OERI) in the United States Department of Education. It provides information about each of the office's branches and services: Office of the Assistant Secretary; National Center for Education Statistics; National Library of Education; Office of Reform Assistance and Dissemination; National Institute on Early Childhood Development and Education; National Institute on the Education of At-Risk Students; National Institute on Educational Governance, Finance, Policymaking, and Management; National Institute on Postsecondary Education, Libraries, and Lifelong Learning; National Institute on Student Achievement, Curriculum, and Assessment; Library Programs; and Media and Information Services. Contact information is provided for each department. (LMI)