Hey guys, just barging in to say, yes, it's INFURIATING sometimes. SACs are a hideous system open to horrible abuse, mainly in the less prestigious schools.
But this is the way it is, it's too expensive and impossible to have VCAA mark everything - think of their ridiculous security levels! If they were writing, delivering and marking SACs/more exams, they'd have to have everything done courier post, supervisors, rules to the nth degree, incident reports if people just needed an extra sheet of paper, at least 2 markers per paper, etc.
So instead, they delegate it to schools - so they can get away with ABSOLUTELY NO security, consistency or fairness. Yeah, the system's corrupt. But spend an afternoon studying the Indian education system, and you will come out jumping for joy that you get VCAA. So you've gotta live with it. (Interestingly, my grandma said their assessment was one externally marked exam per term, so 4 total, in the exhibition building.)
Have you talked to your teachers about it though? Like, be subtle. 'What exactly did you mean with this question? I couldn't figure out what it meant on the SAC, because the words seemed /just a bit/ funny, could you help me out with how to interpret it?
*hint hint* I'm pointing out it was hopeless, pls rethink how you marked it and DON'T DO IT AGAIN OR I WILL HUNT YOU DOWN'. Or, if you're their blue-eyed boy, you can even talk about it directly (don't 'complain', just 'discuss'

). Anyway, your aim with SACs is to beat the system. Like, if you know they use VCAA questions, why not grab that golden opportunity! It's not cheating per se, it's just being logical and opportunistic

. Based on their past weird methods, try to figure out as close as possible what sort of things the teacher is likely to put on the SAC, and study up for that.
But remember: if your hard study seems utterly wasted now, it WILL boost your exam mark. People who scramble successfully through SACs without understanding the content will fall before you when you dominate the exam. Not that SACs aren't important, but especially in maths subjects, the exam is MORE important. And you 100% control how you go in the exam.
Alternatively, save up your pocket money to buy a stuffed toy donkey, and call it the name of your teacher. After every bad SAC, whack it with sticks, jump up and down on it, tear its ears off &c. &c. (Depending on how bad your teacher is, you may have to purchase a few through the course of the year).