So he can qualify for DYS based on just a non-verbal score?
DYS requires 2 of the 3 options listed on their qualification page. One of those options is the WISC and requires a score at the 99.9% level on FSIQ, or GAI, or VCI or PRI. We are applying with our verbal in that range and also used extended norms so the details on when you can do that are still fresh in my memory. Our NeuroPsy calculated them right in front of me as we chatted, explaining that it is considered proper to use them when 2 or more subtests are at 18/19. I'm not sure that it will be enough to reach the threshold of DYS (our score only went up by 2pts) but is worth considering if it could make some difference for you.
For the other options you can use achievement testing or a portfolio showing his work at 2/3 grade levels ahead. We did private achievement testing in conjunction with our IQ testing both times since it gave more information about what our son needed. Hope that helps!
