in north america, it is 14. Most eighth graders are 13. Unless you skip or get red shirted, then you could be 15 entering high school. But then an annual review in elementary school would be done with the teacher and be subjective and how do you get around the fact that so many bored HG kids could perform poorly?

There is a whole thing going on with online high school that because they needed to hire a bunch of teachers to do it, there are easy As being online. How do you evaluate for college entrance when there are a bunch of inflated grades due to substitute teachers not caring. I know that covid is an aberation but it affects 2 years of kids applying to universities.