I think Gratified3 brought up some very interesting points about what works right for individual learners. My kid also hit for example 160 on the WIAT in Maths, she has her WIAT normed to two grades above herself, so I feel that it was a reasonably fair result.
My kid is so most of the time, not interested in maths, that it is almost painful, as a parent to watch. However, at school, my child is working at seven grades above herself in maths. In fact, the only way, I have really found to get my child to do maths, which she obviously doesnt find that difficult is to offer various forms of "incentive programs"! Such as, when you are finished with HS maths, then if you want too, you probably never have to study maths again. She *loves* that idea!
What an IQ / Achievement Test can not accurately capture is my child's in the main complete lack of interest in maths, nor does it show how she can rapidly progress through her school's maths curriculum. She does, in fact, blow off some tests if she isnt in the mood. Nor do they reflect, that in the future, her same age pals, that do enjoy in maths and are prepared to work hard at maths, will most likely surpass my dd's mathematical abilities.
