So, I did what any great teacher would do, I left the room. Before I left, however, I said to them, "YOU need to come up with something that works for you." I left for 8 minutes (stood outside the classroom door). What I overheard was kids talking and others going up to the door. When I walked in they came up with the plan:
מתוך הבלוג של ברט יאנג