Do you have any drawings or scribblings that he might have done over the years? It doesn't have to be schoolwork.
We sent drawings that DS had done (incomprehensible as far as the art went) where he had labeled all the parts of a "mousetrap" he made up, and a couple of notes he had written to us and the neighbor girl about various things, and scribblings of math and numbers because everything he did had numbers, and a Frog and Toad story he wrote, stuff like that.
His art and his handwriting were horrific, but these were all things he had done when he was 3 or 4 or 5, when most kids aren't doing things like that. Between that and his WJII scores, it was enough. We didn't even have an IQ score.
