I recommend to get a good grade in your standardize test. I took class from a test prep company call ClarityEd http://clarityed.com/ and they were very good. Their SAT test prep http://clarityed.com/test-prep/sat/ , AP test prep http://clarityed.com/test-prep/ap-exams/ , GMAT test prep http://clarityed.com/test-prep/gmat/ , and ACT test prep http://clarityed.com/test-prep/act/ are top of the line. They offer online classes but I took the class located in Longmeadow, MA http://clarityed.com/offices/longmeadow-ma/
Good luck!