They take sides.
Second graders know the importance of having friends, and they want to decide who’s a friend and who’s not. Some kids this age might refer to non-friends as “enemies.” Having strong friendships gives them self-confidence, while being excluded can be a tough pill to swallow.
What you should do: Teach your child to respect all his peers, even if they aren’t all part of his inner circle. Ask him how he would feel if he were excluded, which should teach a lesson in empathy. When you have a chance to talk to the teacher, don’t just ask about reading and math; ask how your kid treats others.