'VCAA sources' sounds like bs
I'm pretty sure there's been a change in the exam, as in the 10 mark question is no longer definitely on change like in past years, it can come from anywhere in the study design. So if they were making that change, I doubt they would ask about change or Kotter. They still might though.
Questions I can think of that are big enough for 10 marks:
Compare and contrast motivation theories (Maslow, Herzberg, Locke)
Compare and contrast management structures (functional, divisional, matrix)
Compare and contrast management styles (autocratic, persuasive, consultative, participative)
Startegies in Operations management (materials, facilitates and design layout, technology, quality)
Advantages and disadvantages of centralised and decentralised systems
Advantages and disadvantages of outsourcing
Kotter's 8 steps
What else is there?