Number the board with the number of groups you have – 1-5 if you have 5 groups, 1-10 if you have 10 groups, etc. and when their rehearsal time is up, announce that the playwright should come sign their group up for a performance slot on the board.
Perform in the order listed on the board.
After each performance, ask the audience for their reactions to this play. What was the message/moral?