Welcome!
I'd reframe the way you look at your child: he doesn't have a "relative weakness" in maths, but a "relative strength" in the verbal field - I fact, he appears to be gifted in verbal reasoning, while above average in the nonverbal field. In fact. Almost all of his test scores in the non verbal field, both in the iQ and the achievement testing,with the exception of the one math test he threw due to perfectionism,appear very close together, solidly above average (being close to the middle of the bell curve, I think 10 to 14 is closer together than, say, 12 and 16 - someone will correct me on this if it's rubbish).
What stands out is, as has been said, his verbal strength, a relative weakness in writing which you are aware of and appear to be tackling (really, difficulties in fine motor and graphomotor skills alone can make a child who should otherwise be just fine in school with his skill set thoroughly miserable) and, of course his processing speed, specifically the symbol search subtest - the other subtest is, again, squarely in the above average area. You will have to find out what happened there, maybe it's a pointer to a very specific problem you can attack once you know what's going on, or maybe it's just another fluke again. Not sure what symbol search entails, but I'm sure aeh will chime in and explain.

Last edited by Tigerle; 07/13/15 01:40 PM.