Good SAT prep site?

Hi everyone! I started preparing for the SAT on Khan Academy which has a free, full SAT prep course. Is this site enough to prepare me for the SAT?

Khan Academy is a great tool. Make sure you take all of the official tests. Those are the most important. Explanations are available for all of the tests. If you need more practice, Princeton Review is the best non-official book. Also, I just saw someone post about a question of the day instagram: @sat_qotd … Looks like that post might have gotten deleted though.

Thank you very much! It’s been a really good resource so far but I’ve never used SAT prep books so I was a bit nervous.