Problem-based learning (PBL) is an educational approach centered around problems rather than courses, where students work in small groups to solve problems and stimulate self-directed learning. It draws from several learning theories and allows students to learn in a contextual manner. The role of faculty changes to facilitating learning. PBL requires resources for small group work and faculty training to learn new facilitation skills. Benefits include active learning and clinical relevance, though it also presents increased costs and resource needs compared to traditional models.