How much improvement did you see on the SCAT from year to year, and is there a way to see if there is "adequate" yearly improvement (I use that term very loosely)?

My DS8 just took the SCAT for the second time. The first time was 11 months ago. His math scaled went up 16 points, his verbal scaled only 4. I am guessing his math went up so much because he was accelerated and really has learned a chunk of new math skills in the last year. But I am concerned he has little challenge in language arts and the scores seem to suggest that may be the case.

On the other hand, his raw score went up 4 in verbal and only 3 in math, so ... maybe I am completely wrong? crazy