This document discusses problem-based learning (PBL) and how it can be used in teaching. It defines PBL as an approach where students work in small groups to solve open-ended problems. The document outlines the key characteristics of PBL, including self-directed learning and facilitator-guided problem-solving. It also compares PBL to traditional lecturing and discusses different PBL models. Potential challenges of PBL are noted, such as being time intensive and stressful for students. Examples of how PBL could be implemented are provided.