Allow students ten minutes at the beginning of class to rehearse.
Establish a performance order. Move to the performance space (we performed in the commons). Ask students to bring their journals. Have each group perform. After each performance, while the next group is setting up, have students write down one thing that the previous group did well.
After all of the performances, have students move back to the classroom. On that same journal entry, have students write down three things they felt they did well and one thing they would improve on if they were to do it again.
Students can play Freeze! with any time that is left.