so i've just started year 12 and im doing 2 sciences and psychology. I really want to do well in my subjects but my teachers have told me it is very hard. They have told me that good students do 5 hours extra work outside the classroom a week for each subject, however i need to know what else i'm meant to be doing in these hours? Also we haven't learnt much yet so there's not much to go over or revise. Am i meant to be doing all this stuff from the very start because i also don't want work to build up either?