Well, I've finished my prelim year and I'm starting to get back my results from the exams that I've done.For the exams my percentage ranged from 44%-70%.I did worst in the prelim exams compared to my half yearlies.I just want to know that if I actually put more effort in my subjects, not study like a few days before the exam and do homework, past papers etc will I be able to be in the 80%-100% range and get high marks for Year 12. I really want to excel, do well and get a 85+ ATAR in order to go to USYD.