A little addition.
First time when I read your post, I didn't pay much attention to tourettes syndrome. So, what can I add... My son, he is 13, is learning in usual school. And two of his classmates have mental diagnosys. As you can understand, their learning is mainly in visiting school and talks to other classmates. Not more. But I think that this is enough for them. Here I think, we can use an Olympic princip. The main target is not to win, but to participate. Sure, there is a possibility when other classmates will treate a disabled classmate. Children are really angry persons. But here is a way to learn other what is a tolerance to disabled people.