Oh Debbie,
DHs feel that it's their job to 'fix it or ignore it' - and the educational fit for your DS isn't going to be easy to fit!
My DS also whistled every waking hour during the age of 9:
"Hey mom, great news, I can whistle inhaling AND exhailing!"
Sounds pretty sick, right?
But then at his private school interview, the lady who was testing him said "Do you HAVE to whistle?"
He shut up and didn't whistle again. When I asked him how he did it, he said he knew that when she asked him, that if he didn't he wasn't going to be able to go to that school. So he stopped.
((shrug))
Try 'Dottie Says' on DH.
Or offer DH three choices -
1) quit job to homeschool (you or DH)
2) ask for another full skip to 4th with 5th grade math, I mean if he's placing at the 60th percentile without being in the classes, then how would he place at the end of the year.
3) Get testing and see what advice is offered.
My favorite story of all (a friend's kid) is that they know a gradeskip is needed when child gets a bald spot from hair twirling.
Personally, if you have enough date to fill out an Iowa Acceleration Scale now - I'd save my money and try the second alternative.
Maybe our DSs can do elementary school two times fast?
((giggle))
Grintiy