This paper identifies a number of factors that staff developers should consider in planning an effective program. A staff development program is considered to be effective if teachers adapt the material or content learned into their classrooms and retain the implementation over time, if teachers and administrators express satisfaction with the program, and if student achievement in basic skills is increased. The following dimensions to consider in planning a professional development program are discussed: (1) program purpose; (2) organizational content; (3) program delivery; (4) scheduling of activities; and (5) program policy and management decisions. (JD)