15. Teacher's emergency toolkit
Giving an "emergency kit" to an instructor is a nice way for them to get something handy or a bit of a joke in their desk drawer. For example, the "emergency kit" might be just a plastic box filled with candies that they can snack on throughout the day. It could also be a pencil box filled with useful things, such as deodorants, probes, gum, bandanas, and anything else they might need in class.
Either way, these kits should be filled with things used during the school year. Even if they are just trivial items from Dollar Tree, everything will help a lot when you live on a teacher's salary.