[Rivière]

Does your school allow you to wear a mask bracket? They're a piece of plastic/silicone that you wear under your mask and over your mouth/nose which pretty much allows you, quite literally, extra breathing room.

I saw a guy on the train here wearing them pretty recently and they looked really handy as he was reading and wearing glasses. It helped prevent his glasses from fogging up so obviously it works.

If you're not sure on your school's policy, you could ask and see what your options are.