Jeni, the WISC IV has working memory and processing speed weigh in heavily to FSIQ. There has seemingly been some differing opinions on whether or not this is a good way to reflect intelligence. I think that may be a reason your son's tester focused on GAI.
Also, as Kriston says, PRI score is a qualifying one anyhow.
Good luck with the meetings. I'm glad your school is being proactive. I agree that a grade skip from 2nd to 5th or 6th might be a big first step. That doesn't mean he isn't capable of work at that level, it just might be easier to step him up a little at a time.
You may not feel like an expert on what these numbers mean, but you ARE the expert on your son. And probably, by April or May, you'll be an expert on what those numbers mean for him anyway!
