Your situation is called overseas check collection, that is, entrusting a bank to collect checks from the issuing bank, but the biggest problem is that most banks in the United States do not handle check collection, because American law stipulates that the retrospective period of checks is 6 years, that is, within 6 years after the check is cashed, the issuing bank has the right to trace the money at any time. As a collecting bank, the money collected has been paid to the customer. If it goes back, the bank will lose money. Therefore, it is suggested that your classmates remit money to you by international wire transfer, which is convenient and fast.