Hi Rob! These are all excellent observations and you're right about the challenges, particularly the student who may dominate the group and the student who does not make any significant contribution or carrry his or her weight in group effort.
I have found, as you referenced, that helping the group to establish clear ground rules about the roles and responsibilities of team members, plus making sure that your expectations of tasks, learning objectives and outcomes are also clearly communicated, help in the process. Sometimes a dominant personality needs to be privately and professionally reminded that other group members must have… >>>