I try and help out each year. One teacher for a student that has a dear place in my heart was needing things to help kids learn to read, connect to the Internet (they are underprivileged low income families), and I bought her 6 kindle fire hd tablets, cases, and screen protectors. She's been using them for a few years now and she says it's helped her underprivileged kids tremendously learning to read, technology, and what the Internet even is.
I also bought a really nice drum set and donated it to the school band because the one they had was from when I was in high school (23 ago)!! It was ragged and taped up, etc.
When we were in 12th grade, in Spanish 4 class, we had to teach a 1st grade class basic Spanish; numbers, colors, animals, things that they were learning in English now, but in Spanish. Well, all the students bought a bunch of supplies to do our projects so that the main teacher didn't have to.
It's terrible how underfunded our schools are.