A Clinical Supervision Training Program was designed for department coordinators for mathematics, science, English, and social studies in four high schools. The program lasted throughout the school year, and included three full-day and one half-day workshops as well as four small group meetings. At the first workshop, the program was introduced, and the concept of clinical supervision was presented. The second workshop introduced various classroom observation systems (e.g., Flanders' Interaction Analysis System), and participants learned how to design new instruments and to use existing instruments to collect varied types of data. A third workshop provided opportunities for discussion and practice of the various stages of the clinical supervision cycle. The closing workshop included an evaluation of the program and discussions of participants' reactions. A discussion is presented of the data collection process and findings from the data, and the program is examined in the light of current beliefs about effective staff development and supervision. A brief review is included on alternative ways of implementing clinical supervision in the schools. (JD)