This is a good organizing activity that will help students learn basic bookkeeping skills. Have your students help you take an initial inventory of the classroom. The first thing you should all do as a class is separate the room into sections, and assign inventory sheets for each section. Have your students work in groups to catalog all supplies in each area, writing it down carefully on the inventory sheet; they should leave room for new additions or changes. After all of the groups have completed the inventory, collect the sheets, laminate them, and place them in a marked place in the room. You should pick one day every week (or bi-weekly, or any time frame that fits your class schedule) to have students go through each of the inventory lists and tell you if more supplies need to be ordered, rotated, or restocked. This helps to maintain orderliness in the classroom while at the same time teach your kids about simple "business practices."