How to increase in CR. current score 600
I am an international student. My average current score in CR is 600.
I did all the released tests from 2005 until now, the online course, and the official sat study guide tests.
I memorized vocab lists: barrons(800 words), direct hits, and another one that has 1000 words.
Should I do the released old SAT tests (before 2005), or should I use other practice books?
What else should I do to raise my score to 700+?
any advice is appreciated