Learning groups for lab work,works well as long as the groups remain small. A maximum of three people per group works well in our industry. It is important to emphasis that each student must perform all required tasks. I find that quizzing each group member verbally while the learning teams are performing help to evaluate the effectiveness of the team performance. Team learning groups based on lecture or additional self study is more difficult because the atmosphere is more relaxed. Giving each team a question to answer based on the lecture seam to work because it gives the team a goal.