We might move in the direction of fair equality of opportunity by maintaining public schools financed by general tax revenue.  Further moves are possible. A state might require that local governments equalize spending per pupil across school districts of varying wealth. A state might mandate extra spending per pupil in low-income school districts, with a view to offsetting extra resources provided to children with affluent and well-educated parents. A state might mandate mixing students from different neighborhoods in comprehensive schools so that children from low-income and high-income families are evenly spread across area schools. A state might ban privately financed schools at the primary and secondary level in order to prevent high-income parents from avoiding measures to promote equal opportunity in public schools. And so on. In the contemporary U.S., even the first-mentioned of these FEO-promoting measures is controversial.