P.S. My DS has an LD and couldn't memorize any of the math facts or rules, or spelling rules. But he can remember odd things like that the word has 3 Os, and A, two sets of double letters and a total of 8 letters. That's how he aces his spelling tests. He never did get timed math fact tests under his belt, but as soon as they stopped them, his speed in doing math went up and he no longer needs extended time on tests. So, yes, I have a kid who is great in math, and needs understanding for how he learns.
My son doesn't liked to be timed either and gets very frustrated if he feels pressured. What kind of LD does your son have?
