My DS has 4 LORs in his USNA file and we have room for 1 more. Our AC said if we choose to submit a 5th one that it should be unique. So far we have counselor, math teacher, science teacher and USNA grad. For our final LOR we are considering using one of my DS's classmates or a supervisor. We are leaning toward using the classmate. I'd be interested in experiences, thoughts, perspectives on this approach as well as other ideas. Thanks in advance.