Thanks for your reply Grinity!
Well, unfortunately whether I wanted to or not I imagine I would have a fight on my hands to grade skip him again. It was a different school that did the first skip and it was their request not mine. I think that he could probably cover any material in math that he might miss in 4th in the next few weeks of summer. I bought a general 4th grade math book and much of it looks like third grade review with some bigger numbers. Reading etc. is at high school level. The good news is that his upcoming fourth grade teacher was a Physics major and is crazy about math and science. She is also open to talking about adapting the curriculum for him and I hope it really happens. I think she has a lot to offer him in those two areas especially and I hope she is able to recognize his capacity to learn.
He has not done any gifted programs, summer or otherwise. He does love Chess and he is into some PC games that I imagine might attract similar minded kids...like Civilization IV. These are areas where his behavior is okay. The more I watch him the more I think it is Sensory Issues which was an early diagnosis (age 3). He starts counseling in a week to help address his social issues. We do many extras at home with him as the leader on topics etc. and he really enjoys it. He tends to get on one topic and discuss not much else for days or weeks until he wears it out for himself and moves on.
I think I was looking at IQ testing as a way to learn more about what his learning needs actually are and as backup to any conversations/issues that arise in school. Although I will say that I recently read, on advice from some on here, the book "Losing Our Minds..." by Deb Ruf. It is still not a definite for me where he falls out but it was interesting to note that the IQ number seemed to be not as important and some make it out to be.
In any case, we will see how fourth grade goes (hopefully with adaptations) It is the following year I am most worried about as he changes schools and the new school is an administrative mess and I am not familiar with any of the teachers.
Now...enough about my DS. How many children do you have and how are things going for you guys? :-)