A report from the OECD, which sponsors the international assessment PISA, finds that competition among schools for students (“choice”) is not associated with higher math scores but is associated with higher levels of social segregation.

“PISA results…show that, on average across countries, school competition is not related to better mathematics performance among students. In systems where almost all 15-year-olds attend schools that compete for enrollment, average performance is similar to that in systems where school competition is the exception.

“What this means is that school choice may actually spoil some of the intended benefits of competition, such as greater innovation in education and a better match between students’ needs and interests and what schools offer, by reinforcing social inequities at the same time.”

In the U.S., school choice began as an integral part of the opposition to court-ordered desegregation. The word “choice” was a code word for segregation. Southern politicians were all for choice because it would allow white students to “escape” to white schools, leaving black students in all-black schools. Today, charter schools are more segregated than district schools, even in districts that have high levels of segregation, according to the Civil Rights Project at UCLA. today, the media celebrates all-black schools if they get high test scores. Charters have become a way of enabling renewed segregation.