AFT teach the subject, but they also focus on teaching how to read through all the CASA bull
to pass the exam...
Take flight planning as an example... we all learnt and understood that your fuel burn changes greatly with a difference in weight/temp/FL etc... however we also learnt how to understand what the question was REALLY asking, to then methodically work our way through quickly and accurately so that we didn't have to resit the exam and pay CASA another cent more then required...
Otherwise Rob Avery goes pretty in depth with it all...