It is very difficult to resolve a situation like this at the very end of the school year. It is is also understandable that the teacher doesn't want to devote a lot of time and energy to resolving a situation that she doesn't even observe at such a late point in the year. However there are a couple of things you can and should do to help your son.

1. Make an appointment with a member of the administration to explain the situation. this can even happen in the beginning of the summer, they continue working for a while. Make sure that the bullying is documented.

2. Request--from the teacher and in your later meeting with the administrator--that your child NOT be in a class next year with the child or children that bullied him.

3. Do no take it in your own hands to resolve this issue. Parents are often defensive about their child's behavior and may not take kindly to you pointing out that their child is a bully. You don't want to end up with bad feelings between you and another parent when it can be avoided simply by keeping the children separated for a year which will hopefully end the bullying cycle--giving you a chance to teach your son the skills he needs to stand up to bullies so he doesn't become the target of one again.

Good Wishes and Great Parenting,
Dr Susan Bartell
JustAsk Expert
www.drsusanbartell.com
Twitter @drsusanbartell
NEW book "The Top 50 Questions Kids Ask"