For the last two years our team has been doing an annual school supply collection (warning, we live in a rather well to do area. This may not have similar success depending on how wasteful the students in your school systems are)
We collect lightly used school supplies that students would normally be throwing out at end of the year, sort through to make sure taht all are of usable quality, and then donate them to a needy school in the area. Every year we probably collect roughly a quarter ton of usable materials for donation. Great times
