I think in your shoes, I'd definitely go for achievement testing such as WJIII. If there is a large discrepancy between IQ and achievement, that might be a red flag. My son's scores weren't as high as your DDs, I think his VCI was mid to upper 140s, with slightly higher PRI, similar WMI and exact same PS. The psych didn't mention any possibility of LDs. He did say that DS might need some extra time on tests later but I think that was more b/c of new situation, nervousness and perfectionism. My DS doesn't learn his times tables and division facts w/out LOTS of repetition and practice whereas other kids who are MUCh less math intuitive, seem to get them quickly. Very frustrating... Other than that, he writes well, spells on grade level or above when he cares about what he's writing and otherwise has no other issues.
