In nearly all states, white students go to school with other white students, and black students go to school with black students. You can see that segregation in these maps from the Urban Institute.
The vast majority of white students, for example, attend majority white schools:
The map for black students makes a large swathe of the US look well-integrated. But those tend to be counties with very few black students in the first place. Counties where there are more black residents also see more school segregation.
And where Latino students are most prevalent, the trend is spreading to them too — although in many of these counties white students are in the minority, so it's logical that schools are majority-nonwhite:
American schools are, in a way, getting more diverse: they are projected to majority-minority for the first time this year. But that statistic hides the truth about schools' racial makeup. Even as students become more diverse, many are attending classes with other kids who look like them.