Thank you everyone so much for your thoughts. I really appreciate them and they have given me a lot of food for thought.
Indigo: i think you are right that he really wants a real challenge. How you make things 'real' before they are is quite challenging. I teach at a university and i struggle to do if for my undergrads- so not sure how you do it for 10 year olds. I particularly felt he needed more interesting work before he was in the class he is in now. He now come home and is excited about some of the the things they are working on. But still he can't seem to do much with this excitement.
Aeh: some of your comments really ring true with some of his teachers comments. She commented that he is very engage during class discussions and comes up with some unusual ideas. However, when it come to writing it down he doesn't do much. I guess as a frustrated mum i have felt like he isn't 'trying' but maybe he is struggling because the basics are not there.

I am wondering what the best approach is the best approach from here to see if this is what is going on.
We have had his eye-sight tested. Just a normal eye test at the optometrist. Not sure if we should do anything else?
Who would do the sort of testing of in-depth achievement and process measures? Would it be the psych who did the iq testing? What sort of 2E issue could it be?
If we think from observation or testing are there resources or approaches to help him with increasing his automation?

NDW: thank you for the suggestions of the eye test and for the books. I will take a look at them. Thanks for telling me about your daughter-I am glad the double skip helped her to get interested.

Eco: did you find anything that helped your son to deal with the differences in his GAI and PSI?

Wanted to say again- thank you.
HHBella.