How to significantly improve SAT math score

Hi,
I know this thread is probably a rehash so I apologize for that, but that being said-My current SAT math score is a 600-not good I know, especially for the schools i’m applying to (my reading and writing are in the 700’s). I’m using the SAT official online course, bought the college board book and have a tutor but despite my vigorous practice and examining of my mistakes, in my practice tests I continually hit in the 600’s. Any specific advice on how to practice that might change my scores or any general tips on taking the SAT math? Thanks