If she has cheated, then she could drag down your internal mark for the HSC, as she can't perform to the same standard in externals due to the obvious fact she doesn't get to change her working out for the HSC exams once it has been handed in.
I remember all my exams except for art (and english) were really close up (In 2014)
Except Art was 1.5 weeks or something after my last and I was so over HSC so didn't do any extra preparation.
Have a look on http://community.boredofstudies.org/44/english-area-study/329816/blits-guide-choosing-related-text-discovery.html
and see if any related texts strike your fancy.
Finished and submitted an excel assignment for ACCG200.
Was struggling but suddenly worked out what I was doing wrong, and then it came along very quickly!
They sound pretty good.
What degree/career path are you currently thinking of entering?
Also consider looking at previous cohorts performances in the subject, syllabuses and notes of HSC subjects.