When my oldest two were in public school they were asked to bring film for the camera (teacher took photos during the year of the students, some times you got a picture sent home of your child...etc), lightbulbs for the teachers lamp, hand soap, kleenex, copy paper, colored copy paper, dry erase markers, post it notes and many other things that they never used personally. I understand that teachers have to spend much of their own money for these supplies....and that makes it hard. I always supplied everything requested but now I'm glad to be out of that loop. I hate that they spend their own money....I really wish the public schools were in a better state.
Half of that stuff should be supplied by the school and the other half should be supplied by the teacher. If a teacher wants to take pics of thier students, or use post it notes then there is no reason they shouldn't be buying that stuff themselves. If it isn't a need in the classroom then it shouldn't fall on the parents to supply it.