Amy - your ds has quite a bit of scatter in a few of his scores - did the psychologist address it? I'm not familiar with the K-ABC so I don't have any clues re what it might mean, but fwiw I wonder if the dip in short-term memory scores - if it's a real dip, not due to being uncooperative with testing or some other reason - might not be a source of some frustration for your ds. My dd8 has a significant dip in associative memory and it can create situations where what she thinks she's been told or knows is very different from what the other people around her know and it leads to some very challenging behaviors at times. Her dip is a little larger than your ds but not hugely larger (otoh, she was tested with a different ability test).
polarbear
ps - another thought, when the psych said that they very rarely see test results like this - granted, they are high test scores that aren't going to be "usual" for any psych... but otoh, I'm guessing that as a school psych, the psych is in a position where he'll see even less high IQ kiddos because the bulk of his work may be with kids who are struggling with learning challenges. Please know I'm not a school psychologist and am only using personal conjecture so I could be entirely wrong about that! I just know that when our ds went through the IEP eligibility review process for Specific Learning Disability, we were constantly being told "we've never seen scores like this" for all sorts of things from IQ test to state testing etc - and it wasn't a statement so much of "Your son is a once-in-a-lifetime amazing genius" as much as a statement of "we don't usually evaluate and offer services to children with such high ability". It was also a convenient phrase for the school psych to throw out in a team meeting to imply that our ds didn't need or qualify for services. Anyway, our experiences with school psychs haven't been encouraging or helpful - we've had to rely on private evaluations to really understand our ds' challenges.