Make sure you know your content. Biology in QCE is generally memorising, so know your definitions so that you can elaborate on what you are talking about. I'm not doing legal but I assume it's also memorising. For english, you will need to memorise your essays, but I don't know about VCE. This is from a QCE perspective, sorta. Just memorise your information and you'll be good to go. For maths, if you want to excel, practice it every day and always be open minded to the different questions that could occur. Find resources online, on youtube is good too.
Hope this helps!
-Leeshi
