3. Crayons, markers, and colored pencils can also be a problem you may want to keep them yourself and allow students to have them only when needed for projects or assignments lt is also a good idea to have a container of used crayons as replacements when needed. These can be collected from students themselves as they discard old, broken crayons. If you prefer to have students bring in their own supply, let them know the day before and post a reminder near their lockers the morning of the activity