I'm confused by the interpretation of statistics here.
According to Wikipedia, the USA is about 72% white.
In a perfectly non-segregated world, I would thus expect 100% of students to attend majority-white schools.
Of course, the US is "geographically segregated". (Aside: I don't know how much of that has anything to do with segregation and racism, and how much is just different ethnicities traditionally living in different areas)
But if you mouse over the individual districts in the map, you will see that a lot of them are either very close to 100% or very close to 0%. The remaining districts are about 50% white, so I'd expect that as well.
We also need to account for the astonishing fact that majority-white schools tend to have ... drum roll ... more white students than non-white students.
I'm not trying to deny the problem here... when I look closely, I do think I see some segregation. It's not easy to tell from these maps how bad it actually is.
I'd like to see three maps that show the percentage of students attending a school where the racial identity of the majority of the students does not match the majority of the [district, state, nation].