My DD sounds like the same age (8) and is similar where non-verbal is the highest. Block Design 16, Picture Concepts 18, and Matrix Reasoning 19. (psych said she ran out of questions on Matrix Reasoning). Her verbal score was also in the 99th percentile but non-verbal was something like 15 points higher.
My 6 year old took the WISC and also scored a lot higher in non verbal (in his case a 27 point gap!). So he was well over the 99th percentile in non-verbal and average or high average in everything else. The psych who assessed him didn't say much about it, just said that his learning style is "different".
In the report about DD, though, the psych (different psych) talked about visual-spatial learners and how these people tend to go into careers in fine art, architecture, engineering, computers, etc. I don't know about your DD, but both my kids are VERY into the computer game Minecraft, where they can build and design worlds. It's like virtual legos. They have been playing that game since preschool, before anyone had even heard of it. Now it's everywhere.
Anyway, she recommended the book visual-spatial learners by Alexandra Golon and the website visual-learners.com. She also recommended the book "Right Brained Children in a Left Brained World." I've skimmed through a couple books about VSL's and they are interesting but but not sure how much of it is backed up by research.
DD seems to be strongest in math in terms of academics. Not in terms of remembering math facts or rote calculation, but in terms of grasping the concepts. So I showed her algegra once or twice, the kind of algebra that I didn't look at til 9th grade where you have to understand order of operations, and she caught on right away. She also really likes geometry, probability, and statistics.
Hope this helps.
