Australia. That's why there are a lot of exchange students and people who move to Australia for their childrens education. Although, the amount you learn is not much compared to schools in say Asia.
Oh god the schools in Asia.
When I was in grade 3 my school wanted the students(in my year level that is) to know all the names of the bones(from your meta tarsal all the way to your cranium), they also taught us in grade 2 the different types of stars (white dwarves yadi yadi ya...), a tinge of gravity and all these wtf cramming information in your brain... So when we moved to Australia, I found it easy UNTIL year 11.
Don't get me started that was only my science subject.
I also heard my friends were doing calculus when I was in year 9 or 10
So as what to everyone was saying, studying in Asia is like putting a Fist in Uranus