Thank you to the students who quietly clean up our classroom without being asked or reminded. I may not mention it, but I often notice you doing it -- especially as class ends, and I very much appreciate it.
By the way, if the rest of the class won't allow it, the few students who usually do won't be able to mess things up for everyone else. Stand together to tell those students to pick up their stuff, to not make messes in the first place, to not deface desks, books, class materials. Tell on them if needed. Such actions are good citizenship.
