The social constructionist ideas currently reshaping the practice of family therapy are also relevant for supervision. However, if, as postmodernists assert, there is no privileged, expert position, how can supervisors evaluate their trainees? This question-a most pertinent one for university-based supervision, where evaluation is necessary and constant-is addressed both theoretically and pragmatically in this article. Ethical issues are explored, and an evaluation form, developed by the authors for use in a family therapy doctoral program, is presented and discussed.