The document discusses using informal study groups to enhance learning. It describes how the study groups work, with voluntary participation in groups of 3 to 7 students who meet at least twice before exams. Group members take a roster and determine their own agenda. On exam days, the groups create an energetic atmosphere and students can immediately review questions again. Most students find the groups an effective and fun way to learn, and participation rates remain high even without rewards. The study groups turn isolated learning into collaborative efforts that may boost individual performance and reduce test anxiety.