The problem-based learning (PBL) curriculum, adopted by an increasing number of medical schools, requires retraining faculty for new roles as tutors with small groups of medical students. This study describes the procedures and results of four PBL training workshops (1989–1991) given at the University of Hawaii John A. Burns School of Medicine. Eighty-eight faculty volunteers each answered a 20-item multiple-choice questionnaire testing their knowledge of PBL both before and after they participated in a workshop. The posttest results were used to identify deficiencies in the tutors' knowledge and practice of both their role and their function. The authors conclude that these deficiencies, now identified, will be addressed in a systematic fashion in subsequent workshops.