This means for example that my sister who is more artistically talented than I am was sorted into the high school track that is shorter, teaches only the very basics of these topics. Her highschool track ends at 16 and students are expected to go into a college that teaches some kind of physical skill, she did graphical design, and after that got accepted into an academy of arts.
In contrast I went to the highest highschool track, did everything parent post mentioned, did that until 18 (6 years) and was then expected to pick a higher learning college (which we call university) to which you are generally automatically accepted if you have a higher learning high school diploma.
I often wonder how the US deals with this. My sister would be severely unhappy at my highschool being constantly confronted with topics that would be hard and uninteresting to her. I would likely be bored and vastly unqualified for proper university if I went to hers. How would you put us in the same classroom? ( though I would have loved to go to the same school as her, she rocks :) )