Administrators in the Parkway school district in suburban St. Louis spent the summer break crafting a flexible reopening plan, with options including full-time classroom learning, full-time online instruction and a hybrid system. It’s a good thing because the dangers of the coronavirus are still so uncertain that district officials are reluctant to make predictions about the fall semester, even though it is supposed to begin in only five weeks. While confirmed coronavirus infections in Missouri’s hardest-hit city waned in June, they are now spiking, along with hospitalizations.