New York Times

When Covid-19 began to sweep across the country in March 2020, schools in every state closed their doors. Remote instruction effectively became a national policy for the rest of that spring. A few months later, however, school districts began to make different decisions about whether to reopen. Across much of the South and the Great Plains as well as some pockets of the Northeast, schools resumed in-person classes in the fall of 2020. Across much of the Northeast, Midwest and West Coast, school buildings stayed closed and classes remained online for months.