Procrastination isn’t just a student problem: 20 percent of all adults rate themselves as chronic procrastinators. But among undergraduates, the problem is acute: various studies document that 50 percent to 95 percent of all students are affected by procrastination. The problem is serious because when students procrastinate on their coursework, learning suffers. When a student spends an hour on an assignment that should take three, learning is proportionally diminished. For this reason, teachers have an obligation to do more than bemoan the problem.