that is plain bullcrap, coming home studying till 11 or 12, how much breaks you get in between? and studying at recess and lunch, how are you supposed to eat?
do you do it every day or some times, there is a difference, if you do it everyday, you need to get a life, HSC isn't everything in life
and those that want to repeat, god why bother, i know i don't wanna go through it again, i rather do something else even if i don't get into Uni, like Tafe or Private College, then afterwards you can do Uni, if you like, unless if you have the MOTIVATION to go harder on hsc