Students often think of class sessions as isolated events—each containing a discrete chunk of content. Those who take notes during class will put the date along the top and then usually leave a space between each session, which visually reinforces their belief that the concepts and material aren’t connected. But in most of our courses, today’s content links to material from the previous session as well as to what’s coming up next. A lot happens in the lives of students between class sessions, though, and if they don’t anticipate a quiz, how many review their notes before arriving in class? And so the teacher starts class with a review.