Tips for boosting PSAT/SAT score?

I wish to boost my score a lot this summer. I am a rising junior and going to take SAT this upcoming spring. I have only taken the PSAT as a sophomore and want to raise the score drastically - 520 in math and 530 in reading (1050).

I am trying Kaplan Test Prep, Khanacademy, and other practice books. And it is slowly rising - in a recent Kaplan test I got 590 in reading and 540 in math (1130). I think this is working but is it possible for me to reach the 1400+ range in 3 months?

As you get closer tot he test, try using the official tests, from the official book and the online tests that they sell.

Try going to a SAT prep class if you can. They can teach you strategies for the SAT that will help you raise your score. And I’m sure if you are disciplined in studying, maybe 1hr a day, you can reach 1400+ in 3 months. Good luck!