At the College of the Ozarks in Missouri, aka "Hard Work U," says the New York Times, 95% of students graduate debt free because they all must work 15 hours a week to pay for their tuition. There are 7 such "work colleges" in the country, all rural and most Christian; the others are Alice Lloyd (KY), Berea (KY), Blackburn (IL), Ecclesia (AR), Sterling (VT), and Warren Wilson (NC).
According to the College of the Ozarks website,
"Our distinctive work program, one of only a very few such programs in the entire country, makes college affordable for many students who might not otherwise be able to meet the cost of their education. For others, the work program means freedom from having to pay back large school loans after graduation. Best of all, the on-the-job experience you gain as a College of the Ozarks student will add extra dimension to your learning. Unlike many of your friends attending other colleges, you’ll be starting your career debt free; well educated; and work experienced! "
From the article, it seems a lot simpler than that: "Lauren Smollen, 21, who comes from a single-parent household in Jefferson City. “My family doesn’t have a lot of money,” Ms. Smollen said. “Here you’re pretty much guaranteed to have college paid for. You don’t have debt, which is a pretty big deal when you don’t have a lot of money.”"