Hey guys, so I am a little aways from applying to schools and I was just wondering how exactly the PTCAS system works. Is there a way I can calculate my overall GPA and science GPA using the method PTCAS uses?... is there some sort of calculator? Also when factoring in the classes that affect the science GPA... do I get to pick the courses that I want to use...? For example, if I take 4 different bio courses and a school requires that I have 2... can I use the two courses that I received A's in, rather than the ones that I didn't? Thanks in advance!