If your class is organized where students sit at tables, you can help to keep the tables clear by using stackable trays. Using two trays, you can make the top tray a place for finished work and the bottom one can have looseleaf paper. When you need to give a test or quiz or simply want to save time wasted when students hunt for paper, having the paper right on the table in the same place will really help. And having the finished work area will help to minimize things getting lost or misplaced. Students will get in the habit of putting homework in the tray at the beginning of class and classwork in the tray as soon as they have completed it.