Did he enjoy the testing? Or did he tune out during the PRI section of the test? The split between PRI and math achievement is really odd.
And don't trust the blurb on the test results, our WJ-III results said that our son was very cooperative during testing and so the results were a true picture of his achievement levels, but when I asked why all of his fluency subtests were at 0 (which should have invalidated most of the cluster results) the reply was that he had looked at the test sheet, gone to the last questions (which apparently go all the way to 12th grade?), said he didn't know how to do those, and refused to go any further. Very cooperative, ah!
Oh, and where are you that you managed to get him assessed in French?? (I assumed Canada but then you mention an IEP, so...)
I am also dealing with weird test results with a bilingual-going-trilingual DS7, which combined with bright and AS makes for a rather lonely mix, so if misery loves company...
