I use a couple of these postcards each week by slipping them in students’ desks before school. As the card reads, if the desk is too messy, they will need to stay in at recess time in order to clean it up. I also draw popsicle stick names periodically in order to check desks. If the names drawn are clean, they earn points for their team. If not, the team loses a point. These postcards were modified Mrs. Van Dyke.