Strange results here. Science was the highest last year, science actually dropped in raw score from last year and ended up being his lowest score. English/reading was his lowest score last year and was the only subscore to increase over last year to spike to his highest score this year.
To add to the weird results, he took the Stanford Achievement test last fall and science was his highest percentile then.

I suspect he is playing with the answers deliberately. Over the last few months he has taken to calculating the minimum grade he needs on a test to carry an A in class, and then hits it.