I share a classroom, which is also regularly used for cover lessons (moving classrooms) and since September I have lost countless scissors, rubbers, pens, pencils, sharpeners etc. from the room when I'm not there - I'm not sure if the kids are using them and taking them (there is an issue with lack of equipment in the school) or other teachers are accidentally misplacing them. One of the other teachers who uses the room has had the same problem. I have also had the problem once or twice of students having picked up one of these pencils and then claim it's one they have purchased from the school library (same type). Is there anyway to make these thinks less attractive to steal or more identifiable? I've tried tip-ex but that can be scratched off, I've also tried stickers but these are just peeled off.