This guide defines action research and provides historical and theoretical contexts for its use. Specific advice is given for the teacher-researchers engaging in action research, and a case study provides an extended example of the action research process. The chapters are: (1) "Understanding Action Research"; (2) "Deciding on an Area of Focus"; (3) "Data Collection Techniques"; (4) "Data Collection Considerations: Validity, Reliability, Generalizability, and Ethics"; (5) "Data Analysis and Interpretation"; (6) "Action Planning for Educational Change"; (7) "Sharing, Critiquing, and Celebrating Action Research"; (8) "On-Line Action Research Resources"; and (9) "Action Research in Action: A Case Study of Curtis Elementary." (Contains 82 references.) (SLD)