One of the most popular topics these days in education is mastery learning—the idea that the pace of a class should match what each student is ready to learn, as a way to ensure they’re really grasping material. But it can be hard to show educators what mastery learning looks like in practice. Cara Johnson has extensive experience both teaching and helping others using the approach. She talked with EdSurge about how she reaches parents and skeptical students—and shares her best tips for a successful mastery classroom.