What needs to happen for schools to reopen?

President Trump last week urged the nation’s governors to “seriously consider” reopening schools as part of a larger push to revive the economy amid the coronavirus pandemic.

Despite the president’s prodding, most of the schools in the United States will remain closed for at least several months. A total of 45 states and Washington, D.C., have ordered or recommended school building closures through the end of the academic year and shifted their focus to possibly resuming in-person instruction in the fall.

The impact of shifting to distance learning...