Thank you for the response. I am taking chemistry and math 2 subject test this august. Do you think that would be enough or should I switch one of my classes to Biology too? Is it possible to self study biology and take the sat subject test in this time period? Also, I do have an opportunity to volunteer with a professor on his research in psychology. Do you think volunteering for the short amount of time before college apps are due will make a genuine difference in my application?