Maybe your school would be willing to compromise a bit. We recently toured a Montessori school for my son and the Head of School made a point to mention they teach the kids how to use what looked like an old-school word processor. It was basically a keyboard with a small window on the top that showed what was typed. He said it was a way for kids to get their thoughts down (you can print from it) when their handwriting wasn't clear or they had trouble writing. He made the point that kids will need keyboarding skills more than handwriting in the future, and having the keyboards cut down on frustration quite a bit.
I know I can type a heck of a lot faster than I can handwrite something, so that made a lot of sense to me. Maybe the school will allow your son to do a certain percentage of his work on a keyboard instead of handwriting it?
