>Different school districts offer vastly different levels of education, depending mainly on wealth
The data show that causation mostly flows in the opposite direction. The main determinant of whether a school is "good" is the average academic ability of the students who attend the school. And that, statistically speaking, is largely a function of race and income.
Policy interventions based on the idea that school quality determines student performance have consistently failed to show significant results. These interventions include local and regional busing. Putting lower-achieving students in close physical proximity to higher-achieving students doesn't make much of a long-term difference.