I can tell you that, through most of the bay area at least, those policies are mostly about intentional socioeconomic segregation.
My family has deep ties to local education infrastructure and its well known that most of the advocates for these policies are trying to keep poor kids out of their schools. While they don't say it in public forums they're generally more than happy to tell you in private.
My family has deep ties to local education infrastructure and its well known that most of the advocates for these policies are trying to keep poor kids out of their schools. While they don't say it in public forums they're generally more than happy to tell you in private.