My son was already assigned to a repayment plan, but he is having trouble keeping up with the payments. Can he switch to a different repayment plan?
Absolutely. Your son can change his repayment plan for free at any time.
How exactly does a Direct Consolidation Loan work?
A Direct Consolidation Loan allows your son to combine all his student loans into one loan, so instead of paying separate payments to each loan holder, he would only be making one monthly payment.