This sourcebook synthesizes findings from studies on school improvement programs. The prefatory overview emphasizes key themes and issues addressed in the seven papers that comprise the body of the document, discusses the role of staff development, and examines the process of translating research into policy. The papers summarize the findings of research according to different perspectives: (1) effective classroom practices in elementary schools; (2) effective classroom practices in secondary schools; (3) effective school practices at each level; (4) district and state-level practices which support effective school management and instruction; and (5) criteria and methods for measuring effectiveness. The second section presents a directory of successful effective schools programs currently implemented across the nation. It describes 39 programs, of which 13 were developed by local school districts, 9 by state departments of education, and 17 by other organizations, including regional laboratories, universities, and research institutions. A program directory index and a bibliography are included. (JD)