A teacher prepares for an uncertain school year

Editor's note: On Aug. 4, as this issue was about to go to press, St. Vrain Valley Schools announced that the 2020-21 school year will begin with "a 100 percent online-learning model for all students" at least through the end of September.

When the bell rings and students settle into their desks in a couple of weeks, teachers will find themselves face-to-face with a lot of unknowns. The invisible...