Also, I don't think public school is the only way to get this exposure, but creating it elsewhere seems to be very difficult.
> Where did you find data about the social
> stratification of public schools?
However, one of the findings supports my case: "Public charter schools are much more likely than regular public schools to be racially unbalanced. Whereas 30 percent of regular public school students attended a racially unbalanced school (one with less than 20 percent or more than 80 percent minority enrollment), more than 60 percent of charter school students attended a racially unbalanced school. This measure considers the racial makeup within a particular school, rather than comparing the school to the county as a whole."
Based on this, regular public schools are more likely to be diverse or "balanced" than not. This paragraph glosses over it, but it shows that 70% of regular public school students attend a school which has a balanced mix of students from different backgrounds. The segregated public schools are the exception, not the norm, but that segregation increases when parent choice is introduced (i.e. with charter schools where only 40% of students are attending a balanced/diverse school).
The study/quote supports this by giving a rough indication of how most public schools are diverse places. Obviously, this doesn't "prove" the entirety of my statements, it just offers a small amount of support in the area of public schools being either segregated or diverse.
> The study/quote supports this by giving a rough indication
> of how most public schools are diverse places...
I see zero evidence for the idea that it's 'very difficult' to expose home schooled kids to diversity. Indeed it's much easier to do so than with public schooled kids.