Khan Academy is a great resource, and might be enough for some students. If your child is already getting the score they want, it's a fantastic way to build consistency. Here's how:
Use it for the questions. (Skip the explanations.)
Khan works directly with the College Board, which means the questions are the real thing. It also means their explanations have to do things the "official" way. You're almost always better off ignoring why they say they picked the answer they did. Just move on.
It teaches content, not strategy.
Khan wants students to be better at math and reading. I do too, but that's not my job. My job is to get the number on your score report to go up. Khan is great for learning algebra; it's less great for figuring out why a student who knows algebra still gets those questions wrong on the SAT.
Think of it as a practice court, not a coach.
Khan adjusts its drills for difficulty. But the platform can't diagnose why a student keeps missing a question type, and it won't build practice around closing that specific gap.
If you have questions, I'm always happy to talk. I want every student to succeed, whether they work with me or not.