Pell grant.
Tell your kid to look it up, and apply.
ETA: if he is renting, and living on his own he will definitely qualify. If you claimed him as a dependent on last years tax returns, the amount he receives will be a function of your household income.
ETA:ETA: tell him to ask the advisor for his major about scholarships. The relationship he has with his department advisor will define his college experience. Advisors know which professors to watch out for, which scholarships are best to apply for, which tutors to use, which companies typically hir his major and/or offer internships etc.