Your implication is that various populations should be separated?
This is not necessarily true.
If, as in days of yore, you went as far as you could in school and then left without penalty, then whatever percentage of a given population could benefit, benefited.
An all-white high school that is dumbed down for the 75% who are under 110 may not be better than an all-black high school that is dumbed down for the benefit of the 95% under 110.
No, actually I wasn't thinking of such segregation at all when I made my posting. I was thinking that blacks as a whole would benefit more than whites from more vocational education, and would suffer more from a demand that everybody do academic education. I am as interested in seeing academically talented blacks be properly educated as such whites. They may be relatively few, but they certainly do exist. And both talented blacks and whites suffer from the presence in the same classroom of people who really do not belong there, and who would benefit far more from vocational education.
So I wasn't thinking of segregation by ethnicity. But I certainly was thinking of segregation by intelligence.