For what's its worth I would encourage him to go back to school. Here is the thing I get it, I have a 13 year old that had his dx changed to Crohn's while we were in the process of starting the surgeries. After the first one he felt a lot better with a bag on. We are now in holding pattern. He is thinking he might keep it for a few more years until he gets out of school. He realizes that life without a bag is challenging too. He just finished a basketball season. He has one close friend and his teachers that know he has a bag. That is it. Yes they make noise etc. but not any worse than the rest of the 15 year old boys. I also really try to remind my son that the stigma about those types of things are changing. Good luck to you and your son.