Fred Jones talks about getting students to do classroom chores. I've found that if you expect them to do it from the start or act like it's nothing special, kids have no problem putting up chairs, putting away books, etc. if it's taught as classroom procedure. Currently my kids put up chairs at the end of the day, get their books, and put them away, and grab their own papers at the beginning of the day. If I have lunch detention students I make them clean the lab glassware, or sweep the floor, or just sit silently for 15 minutes. (I have to confess that sometimes I'm harsher on days when I need the lab cleaned so I can get some students in to do the work. ) Do you have students do chores in your class? I find it's sometimes difficult to do if you have multiple periods and it's only one period doing certain chores because it's the end of the day.