It might sound silly here, but we were hoping this 1st grade year would get him closer on track with his age group and even if he was ahead, the longer school day would satisfy his desire to learn.
This doesn't sound silly at all. It's completely reasonable to believe that schools know enough about kids to satisfy all of them.
With a GAI of 143 your kid is solidly in 'out there' gifted land, and we can say from experience that it's unlikely that schools have much experience with kids like him, because kids like him are rare.
Stare at this graph for a while and let it burn into your retinas:
http://www.google.com/imgres?um=1&hl=en&sa=N&biw=1280&bih=891&tbm=isch&tbnid=_BQZXoSODKNsZM:&imgrefurl=http://meds.queensu.ca/courses/assets/modules/types-of-data/symmetrical_and_asymmetrical_data.html&docid=EOEs19al1fM-YM&imgurl=http://meds.queensu.ca/co
top .01 Percentile in his strengths. Ug!So - Magic 8 Ball says YES - get the ball rolling now.
If you are living in the USA, also start your Davidson application.
http://www.davidsongifted.org/youngscholars/Check and see if achievement testing was done.
I wish there was a phone hot line where in situations like this you could just call for help and a team would descend on the school and work something out. Sadly you will have to 'transform' into that team. Hopefully the private tester can and will be part of that team. The good news is, we can 'talk you through' the process of transformation.
Congratulations on raising a boy who doesn't want to hurt the teacher's feeling. That's awesome. Fix things for him before his good will runs out; Start now.
Love and more Love,
Grinity