Non profit foundations seem ubiquitious these days to fund the unfunded stuff in public schools.
My kids go to two different schools. Both have non-profit foundations. This is in addition to the PTA fundraising. On one – the fundraising is significant – but it pays for some pretty awesome programs. At the other school it pays for equipment for teachers. (overhead projecters, etc.)
I went to the info session for High Tech Middle last week. They were upfront that they fund a lot of the cool stuff with parent donations… above and beyond the $$ they get from the state.