Freshman year SAT: 570 CR, 720 M, 590 W (1880 composite)
Haven't taken the real SAT yet (rising junior) but practice testing has me in the 2300+ range. For me, improvement came not through knowledge of more materials but rather through understanding on how to arrive at the correct answer. The SAT is all about strategy; the answer is usually clear if one looks in the right place, particularly for CR.
I will post here in nearly a year when I get some real scores.
