Numerous researchers have recognized that supervision is critical in the preparation of counselors and psychotherapists. This supervision manual, which is organized around a coherent theory of training, is intended to help practitioners as they learn to supervise counselors and therapists. The manual is designed primarily for supervision of beginners. Part One offers an introduction to supervision and counselor development and includes an analysis of research and theory, construction of the basic practicum, and goals. Supervision strategies intended to facilitate this process are defined and explained in Part Two. The strategies discussed here can be used by those who work with beginners, advanced trainees, interns, or practicing clinicians. This section features information on teacher functions, counselor functions, and consultant functions. Also discussed are issues surrounding advanced supervision and a model for case conceptualization is presented. All the approaches are grounded in theories of counselor development and theories of professional education. The third part provides the context for the supervision--a practicum course for first-year counseling students. Each week is outlined and various vignettes illustrate supervision in action. Finally, the impact of cultural similarities and differences is explored, as students are trained to be reflective practitioners. (RJM)