I think that I'll have him complete one of the published tests for 7th graders to see how he scores and which type of questions he has problems with. It's also possible that something "clicked" this year. His math ability has grown so much in the past year, perhaps puberty is having some kind of impact on his brain.

Thank you for linking the article, I'll have to get his numerical score on the Star360 and see how much it aligns with his SAT.