> Test scores are shooting up, but it's not like they fired all the teachers and hired new staff at twice the salary. Why are you assuming that the schools are

> Test scores are shooting up, but it's not like they fired all the teachers and hired new staff at twice the salary. Why are you assuming that the schools are responsible for the higher test scores? In my immigrant, upper-middle class community, there's nearly universal use of after-school test prep and tutoring from companies like Kumon. I'd argue that's the reason you're seeing test scores "shoot up" once only few low-income families are left in a neighborhood.