Keep it constructive. As a graduate student, there may be times where you need to provide feedback to a peer. If you are in this situation, be sure to keep it constructive. Speak in terms of what you’d like to see more of, learn more of, rather than focusing on what is missing. Be honest, but kind. You can explain what is missing or what is incorrect in a nice way. Remember, people are likely to respond better to feedback when it is gently and thoughtfully provided. It needs to be true, but it needn’t be harsh.