Which math courses and English courses should I study here on Khan Academy in order to get better at the SAT?

Hi Delta,

If you've already got the basics down, I'd still recommend you give the SAT prep courses on here a try, since many of our learners have reported significant point increases through the use of it. You'd get personalized lessons and tips based on your skill, and you'd be able to improve your SAT practice that way.

That being said, if you want to explore other English and Math courses to prep for the test, you can see the grammar contest here and begin with math here.  

Hope it helps!