lindy,
My son's WISC scores are very similar, although my guy is profoundly dyslexic and has some significant executive functioning deficits to complicate things further. I share your concerns about being able to keep up with the high volume of input and output in HS, especially when the pace and volume quickens.
We have been exploring technology as a tool to help him with the input and output demands. Tools such as Kurzweil will help him read more quickly and fluently on his own (although based on your guy's ACT scores, he does beautifully). Kurzweil has note taking features that will allow him to bypass some of the traditional writing associated with notetaking and writing study guides. Additionally, if his reading rate declines as he tires, the text to voice feature will help him to conserve energy.
Word processing for writing will be a huge help - editing, spelling and output all improve with the computer. There is also a voice to text math program that may help him if he struggles with the written aspect of math called MathTalk
http://metroplexvoice.com/. This is something we are exploring for my son. He is strong at math, but writes nothing down. We're concerned that as he advances to more complex problems, he will not be able to be successful if he doesn't record his work.
I agree with Cricket that he would benefit from a 504 that gives him access to appropriate technology, and extra time for in class assignments and tests.
Was there any other testing? How is his overall organization? Ability to see the big picture? Ability to plan, execute tasks and self monitor?
He has done very well so far as evidenced by his strong ACT scores. But, a large busy HS could be more difficult for him. I would hate to have him land in a situation where his cognitive potential is not recognized or nurtured as a result of his slower processing and potential dysgraphia and dyslexia getting in the way.
