A course in statistics is one of the most difficult at the local university. Because of this, for the past decade the university has arranged for teaching assistants to hold frequent discussion sessions as part of the course. Since the inception of the discussion sessions, 60% of the students enrolled in the course regularly attended the sessions, and the other 40% did not. Students regularly attending the sessions have performed better than those not regularly attending. In particular, 70% of the students regularly attending the sessions received a grade of "B" or higher in the course, while only 30% of the students not regularly attending the sessions received a grade of "B" or higher in the course.