Okay so, i’m not sure whether this is how you understood it, but a very a common misconception regarding scaling is that you can get ‘dragged down’ by some of the weaker kids in your cohort. This is not the case.
Essentially what happens is your VCAA calculated SAC scores are determined by the performance of your rank in the exam. For example, if you were ranked 3rd in SACs at school, your internal SAC score will become the 3rd highest exam score on the external assessment.
Therefore, no one is really ‘dragging down’ your study score. This also means that you mostly do end up achieving what you deserve in terms of study score. If there are stronger individuals in your cohort it is likely they also perform well on the exam and hence their scaled internal sac scores will be strong, just like their exams. The lower end students are likely to under perform on the exam and in turn their calculated GA score will be much lower.
I think it’s simply important that you stop worrying about rankings and what not. Just do the very best you can. I think this system is quite fair and provides a reasonably accurate indicator of student achievement.