My daughter is 8 and up until a few months ago when we moved to Osseo she had been going to Bronson Schools. There is a little girl that was in her class several years that has Ashberger's. She has children in the class that volunteer to help as well as parapro's that come in to help her.
If it is not too far to go for him to attend school, I would suggest you consult with the principal at Ryan Elementary. I think it may be an option for your grandson.