奖学金 and 奖助金
奖学金 and grants are funds that you do not need to repay.
贷款
贷款 are funds that need to be repaid. Terms and conditions vary by the type of loan.
工作研究
Work study is awarded based on financial need and is a great option to help pay for college. Work study is not a grant (you must work to earn it) and it is not a loan (you don't have to repay it).