Many teachers avoid using group work because they fear what happens when students work together—some group members don't contribute, others contribute too much, there's no in-depth exploration of issues, some members don't deliver, others don't show up, group meetings are more social events than work sessions, disagreements get personal, and so goes the list. When problems like these emerge, the students who care register complaints with the teacher. The question then is, who's responsible for fixing what's going wrong in the group?