The evidence that students retain content longer and can apply it better when exams and finals are cumulative is compelling. When I pointed to the evidence in a recent workshop, a faculty member responded, “But I can’t use cumulative exams. My students would revolt.” Students don’t like cumulative exams for the very reason we should be using them: they force regular, repeated encounters with the content. And it’s those multiple interactions with the material that move learning from memorization to understanding.