School office supplies information: Keeping tabs on what you spend in your classroom and on school office supplies both through the district and on your own serves two important purposes. You'll obviously be able to see where and on what your money was spent. But, you will also develop a clear picture of what your classroom uses each year. Then, before spending your own money, look around for businesses and organizations that might make some classroom donations. Often, parents are a good source of simple donations as well.