thank goodness you have the resources available to you to do such a thing!

i hope it works out and i wouldn't worry about sending the wrong message.... make sure that he understands, he's ahead of the other kids and there is nothing wrong or right with that ... it is what it is.

also you may want to make a point that the school has to teach to the adverage level, that is why the work is so easy. he's ahead of that level