Pencasts are videos of problem-solving, narrated by the problem-solver. Join guest Dr. Nandana Weliweriya to discuss his work on the use of student-created pencasts to illustrate problem-solving to their instructor and their peers. In this paper, Dr. Weliweriya describes the use of pencasts in a college physics course, and compares student performance in the class with the pencast submission rate. Students who submitted more pencasts tended to do better in the course. In this SoTL Colloquium, participants will discuss the potential uses of pencasts for teaching at multiple levels in university courses, and how they can be leveraged for increased student success.