Sorry, I've been busy this weekend!
The WJ-III GIA is heavily influenced by processing speed, even more so, in my experience, than the WISC-IV. In addition, if the whole school eval only took 90 minutes, and the WJ was not the only test given, I would wonder if the whole WJ cog was administered, or if only the abbreviated version (BIA) was. That's a three-subtest form with one verbal, one fluid reasoning, and one processing speed subtest, that takes about 15 minutes. Obviously, processing speed has an even greater impact in that case. I do see that the Academic fluency cluster is good, so it's not clear how much of an impact processing or fine motor speed has.
This will be easier to discuss when you have precise test info, of course!
Bottom line, though, it is likely that the first eval is more accurate. It's certainly more consistent with the achievement data. His math computations aren't very high, though (relatively). Does he seem slower than expected with math facts?
