Have you had the experience of thinking your students understand something, only to realize they have missed some critical distinction or failed to notice a key feature or relationship? Pairing contrasting cases with active learning techniques can help. Contrasting cases are close examples that help people discern what makes each instance distinctive. (Tasting wines side by side is a classic example, though they can get much more complex.) Contrasting cases help students notice key differences, which prepares them to understand why those differences are important. In this workshop, you will have the opportunity to think about the examples you choose and how you might shape them to better support students’ abilities to notice the important features and relationships you want students to pick up on.