Shawnn Row waited by his computer Tuesday morning, a Zoom window open and ready for students to pop in with questions.

Instead of walking up to his desk or raising their hands, they would click to a link to ask questions or share their screen to show their work.

Row, who teaches seventh and uth grade humanities classes at Ridgway Secondary School, is currently in quarantine after a student in one of his classes tested positive for COVID-19. It’s the first time a teacher has been isolated after b...