The criticism is not enough time.
So there is time for what? The other crap they do to make up the units? That's not what they want to do!
Reverse the decision in 1980 to make 4 unit a 1 year course! Go back to the 2 year course.
There are plenty of year 10 students quite capable of doing extension 2 in year 11.
Here are the contents sections of coroneos level 1 (the 2-year course version of extension 2)
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These came out in 1966. Dumbing down happened ever since.
How far behind does Australia need to get before we send ALL our kids overseas to get a proper education?