Hi Nathan, great question.
Subsidized loans don’t accrue interest while you are in school; unsubsidized loans do.
Even students should have a cash reserve. A cash reserve is savings to use for emergencies or opportunities that periodically arise. It is a good idea to not spend your reserve to pay down debt, especially relatively low-interest debt.
If you do elect to pay down your loans pay the highest interest rate loans first. You will gain more by paying off the highest interest loans – they are costing you the most. You don’t gain by pre-paying a subsidized loan, leave these interest favored debts until last.