This is a review I used with a couple different concepts, but mainly surface area and proportions. The students were assigned a group (3 students) and given the role of the boss, the recorder, or the presenter. Everyone was expected to stay on task, the recorder had to document everything, and the presenter obviously had to present. The groups were all given 1 or 2 problems from the notebook file and then were expected to explain how they solve the problem to the class. You can also have them figure out a different way they solved the problem requiring them to think outside the box.