Action research, which, broadly defined, was one of the activities in which educators following in the footsteps of John Dewey engaged, emerged as a systematic approach for improving educational practice in the two decades following World War II. Action research then passed into relative obscurity. It has recently re-emerged in the educational literature and provides models for educational improvement. This bibliography, which is a work in progress, marks a place to begin reading about action research. Sources, some of which are annotated, are grouped into the following categories: (1) Early Writings: Before 1985 (37 references); (2) Origins and Concepts (56 references); (3) 1985 to 1990 (55 references); (4) How To: The Process of Action Research (34 references); (5) How To: The Products of Action Research (16 references); (6) Related Writings: Reflective Practice (45 references); (7) Collaborative Research (49); (8) Sociology/Political Theory (two references); (9) School Change (six references); (10) Program Evaluation (three references); (11) Supervision/Coaching/Mentoring (nine references); (12) Organizational Development (three references); (13) Curriculum Deliberation (Contains five references.) (SLD)