We have a small college here in Ky that no one pays tuition for, they work their way thru by doing jobs for the college. They learn woodworking or farming or whatever. Berea College, it was set up to provide a college education to mountain kids who otherwise had no way to pay for it. It has a ton of endowment money in the bank from grateful Kentuckians. As far as I know it is still that way.
Here's the website of Berea College. I'm not sure it is totally free, but it is #5 in lowest debt (if any). Sounds like a cool place - their x-country running team are champions this year.
Their motto on their symbol talks about God and stuff though, so I'm guessing most of these protesters won't be interested.