I'm gathering by your use of the term "maths" that you might be in England. I mention that b/c I'm not sure if the scores are identical on the various versions of these tests from one country to the next. Did you get percentiles as well as scaled scores?
If those WJ-III scores are as high as I'd suspect they are, my first thought is "wow!" If he was very young, I'd wonder if they might settle down to lower levels as he gets older and achievement tests expect more complex work, but being nearly 8, those scores would indicate to me that he is probably more gifted than the IQ scores would suggest.
His PSI obviously pulled down the full scale IQ and a GAI (general ability index) would likely be warranted in this case, but he still seems more gifted than the GAI even would suggest. I'd guess that the GAI probably puts him in the upper 120s range.
My dd12 took the WJ when she was about 7yrs 4mos. I don't recall the subtests being exactly the same as the ones you have listed there. Do you know what math fluency tests? My dd's lowest score was right at grade level at that time but it was on a part of the math test that related to her having had limited instruction up to that point, not limited ability if that makes sense. I wonder if math fluency in any way reflects instruction or speed. Since it is so much lower than the other scores, it would be good to know if it is something that might create an issue should he be accelerated.
That aside, I'd say that his achievement clearly indicates a need for subject acceleration in math. Is that a possibility at his school?
