This document contains tips and information about problem-based learning (PBL) and differentiation from Duke University. It discusses the benefits of PBL, including increased student achievement, engagement, and critical thinking. Key components of PBL are outlined as initiating instruction with an ill-structured problem, positioning students as stakeholders, and the teacher serving as a coach. Criteria for an effective PBL problem are provided. The document also addresses misunderstandings around differentiation and provides examples of conceptual teaching approaches.