Yeah, Doltologist, there are jobs like that. They're called Tutoring and I do excel at them. However, they are usually part-time which means no benefits like health insurance or retirement plans. However, substitute teaching isn't really providing those benefits for me right now, either!
I will keep your scanning idea in mind. It won't give me much info about the students, but it will let them know that I've got an eye on them. I've just got to remember to do it consistently. Thanks!