Once group work has begun, it would be a mistake to let the groups do their work without checking in with them. One way would be to have in-person meetings with each group at various stages of the process. But while these meetings can be useful for discovering how well the production is going, they can often mask internal problems within the group.
In order to get at that information, try having each group member fill out and hand in an Evaluation of Progress form halfway through their work. This information will reveal much of the inner workings of the group and will let the teacher know if she/he needs to step in to help resolve any problems.
Another benefit of using a form like this is that it allows group members’ complaints to be heard without feeling like they are ratting out a teammate. This can be very empowering, and helps to raise their faith that the teacher will intervene if needed.