With the summer drawing to a close, the big question for nearly 60 million U.S. school-age children is whether they can return to school for in-person learning, or must remain at home limited to virtual education. States and municipalities differ widely on whether and how to re-open schools based on differing assessments of the risks of COVID-19 to children if they are in direct contact with each other and with teachers. Teachers’ unions are resisting school re-opening with political demands that have nothing to do with teaching, such as defunding the police, passage of Medicare-for-All, and elimination of competing charter...