citizens owe no allegiance 'upward'. instead, their allegiance is horizontal, to the other members of the society. as they depend on each other, as they subscribe to the ideal of political equality, they have an over-riding interest in maintaining the quality of their fellow citizens.
this means that every person must oversee and support the education available to each child. there can not be 'elite' schools, and there can not be schools whose education is warped to form special groups.
this means that every person in a school's catchment area should make sure that it provides a core curriculum that will graduate a citizen. they should also ensure that 'their' school gets, and spends, the same amount of funds as any other, per capita.
people who want their children to have a religious education must do so at home, or in church.