<p>for writing, you need to work on rules of grammar ( they are easy to improve) use ultimate SAT grammar guide and Silverturtle’s guide for it.</p>
<p>as for essay, use academic hacker’s guide to write essay:</p>
<p><a href=“http://talk.collegeconfidential.com/sat-preparation/645763-how-to-write-a-12-essay-in-just-10-days.html”>http://talk.collegeconfidential.com/sat-preparation/645763-how-to-write-a-12-essay-in-just-10-days.html</a> </p>
<p>and as you already have high math scores, I can’t say how to improve on that anymore.</p>
<p>for practice tests, use QAS tests (released tests) and blue book and online course (36 tests are enough to get you concepts, practice and such things.)</p>