Lakishia Fell-Davis is aware that at this point, in 2023, most people are treating the coronavirus pandemic as a thing of the past. For her, though, Covid still poses a real threat: Fell-Davis has Type I diabetes, putting her at higher risk of hospitalization and long-term complications from illness. As such, her experience during the pandemic has shaped how she thinks about her daily life, especially at Ninety-Fifth Street Elementary School, where she has worked on and off for more than a decade as a substitute teacher and teaching assistant. She felt much more comfortable when schools in the Los Angeles Unified School District were online during the first year and a half of the pandemic and her kids, Makayla and Kevin, were attending virtually. Sure, they missed their friends, but they were shy and soft-spoken children who had never really strayed far from home. They didn’t seem to mind the arrangement. And back then, Fell-Davis’s mother, who was paralyzed on her left side after...