Thank you for the great tips. I will read through the recommended material - all sounds great!
I think we are not going to go higher as far as grade levels go and proceed with high school math, instead I think we'll just play around with concepts, deepen understanding and and find some real life applications.
We are a science nerdy family and my son's passion is zoology and biology - plenty to do there and we'll just have fun with it .
Language arts is what scares me as I am not a native speaker ... but we'll manage.
I think schools have to approach to just give the TAG kids advanced curriculum while I think that there is SO much more to learn so we'll branch out into history and geography, and science topics and music, arts ... my biggest worry ... that we'll end up going overboard ... Two curious people on the loose - who will keep us in check and on track ;-)