I teach a small group of students who require specialized services, and I teach mostly out of my classroom. Other teachers use my classroom to teach students because they need the space to provide small group instruction or test accomodations. Other teachers who use my classroom have my permission to let their students use my supplies, because it only seems fair to share things with people who have a lot more students than I do. This year, however, I have noticed that students from other classes are doing what I call "eating pencils." That is, a large number of pencils are being used in a short period of time. How do I solve this problem, especially since these are not students I directly teach, or should I let it go?