Hi Christina! Good response and an excellent question on assigning team member roles in a learning group situation. I might suggest, in reference to your question, that you do both. For example, have in your own mind the roles necessary for successful completion of a learning group task, then have group members come up with their own. Compare the two categories and integrate them with your suggestions. That way, students have defined their own responsibilities and have "bought-in," plus you have influenced them appropriately according to your learning outcomes. Personally, I'm an advocate of letting learning groups engage in trial and error (with some facilitator guidance on collaboration and consensus), therefore a real mirror of workplace reality.