<p>Learning the Greek/Latin roots minimize the amount of vocab you have to memorize because once you know the roots it’s easy to have the meaning of the word. But memorizing the vocab is a legit way of studying.</p>
<p>For the writing, more memorizing is needed, but this time, of grammar rules. Silverturtle’s guide of grammar has everything you’ll need for the SAT. And if you have a tutor, asking him for flashcards of grammar rules to memorize helps, too.</p>
<p>For maths you have to understand the basics they ask for and then do exercises. It isn’t doing one exercise, but ten or twenty until you can apply the basics to the situation asked easily and without wasting too much time.</p>
<p>But basically, to improve your grades you have to just repeat stuff. I’d say you could very easily do every practice test on the blue book, correcting them and seeing where you’ve gotten things wrong and understanding, and get 1800+ easily. As long as you practice.</p>