Sorry- just realised I forgot to respond to the wall post about workbooks. Umm, I had dotpoint for phys and chem and legit never opened them. Surfing is good imo. What is good for the sciences is Success One (get an older edition like 2009 or 2010 for say around $10). Or if you don't want that, I've got HSC questions by topic for most of them so I'll send you those- they're better than dotpoint imo. For eco, Riley is good because it has very detailed answers but idk how much it costs (I borrowed it from school) so might be worth it, might not. I'll send you questions by topic for eco too