Searching Google, I assume you're Australian? I don't know what "stage 12 exams" are.
In the US it's quite possible for a child gifted in mathematics to skip all sorts of things. My third year of college I taught 11th graders the subject I had just covered the previous quarter, Algebraic Topology, and also the theory of computation.
The 9th and 10th graders in the program were learning linear algebra and Scheme (the programming language).
It's weird to be in a room full of people who are in high school and are approximately 100x better at the subject you're studying.
UK - I was making an ironic point that the name of the tests seem to change and get more 'bureaucratic speak' every year.
Under a soviet centralised government system there was apparently more freedom to teach to the student's abilities than in the free world - where everything must match upto the central government stanardized testing quango.
In the US it's quite possible for a child gifted in mathematics to skip all sorts of things. My third year of college I taught 11th graders the subject I had just covered the previous quarter, Algebraic Topology, and also the theory of computation.
The 9th and 10th graders in the program were learning linear algebra and Scheme (the programming language).
It's weird to be in a room full of people who are in high school and are approximately 100x better at the subject you're studying.