[_kyran]

My high school had a vertical curriculum. From the age of 12 to 18, every student got to select 7 different subjects (plus sport) each semester. Most students would accelerate a level in one subject they were proficient at, although due to the 'levels' of classes it would usually end up with each level being 95% a certain age.

There were exceptions, like one student (may have been a savant) finished his high school certificate in four subject areas 5 years early.

This curriculum had its weaknesses. I accelerated in Math at the age of 13 after starting high school. I was then in a class with no friends, and without much social interaction, I'd zone out and spend the lesson trawling the internet.

Since that class, I've struggled with maths ever since and ended up eventually returning down to a standard level for my final two years of high school.

Happy to answer any other questions about having a vertical curriculum for those that are curious.