The point is not to be optimal for every student - the resources required for such are not available and MOOCs are not an adequate replacement. The point is to

The point is not to be optimal for every student - the resources required for such are not available and MOOCs are not an adequate replacement. The point is to lay a universal foundation in a series of selected subjects while socializing students. The model of turning a literate child loose in a library and letting them be for six or eight years should not be assumed as universally useful. It's not a good way to produce a shared general foundation for a modern democracy.