What happens when one viewpoint is all a child gets? Indoctrination. The Common Core pod people would say that the public schools liberate the children from the rigid cultural morality of the parents.
However, only parents have the right and responsibility to educate their children. The limited power of the federal government is derived from (given to them by) the PEOPLE, not the other way around, and this power can be withdrawn at any time.
So it is in education: whatever limited part, or subjects taught, the people have allowed the public schools to do, parents have the right and responsibility to oversee and approve or disapprove, and take corrective action as needed. Those of us who have relegated the education of our children to the public schools, have left our children in the hands of a teaching profession indoctrinated at the liberal universities and driven by the teachers unions; the unions, in turn, are driven by Marxist dogma; and the teachers and the unions are also driven by the feds (i.e. dollars) who are also driven by the liberal universities and by Marxist dogma. What did you think you were going to get from public education? Now more than ever.
Historians have many theories for the fall of great civilizations. But I think that a major factor in the breakdown of civilization is the failure to pass culture on from one generation to the next–father to son, mother to daughter. Anything that disrupts the flow of culture (values, morals, beliefs, faith, teaching by example, etc.) can lead to civilization downfall. It seems to me that where the family is the basic unit of civilization, the thing that holds us together is our culture. Who’s culture will your children and grandchildren be raised in?