Two years ago schools shut down around the world. These are the biggest impacts

Students play at recess on an outdoor court at Yung Wing School P.S. 124 on March 07, 2022 in New York City.

Michael Loccisano / Michael Loccisano

Two years ago this month, schools closed their doors in 185 countries. According to UNESCO, roughly 9 out of 10 schoolchildren worldwide were out of school. It would soon be the biggest, longest interruption in schooling since formal education became the norm in wealthier countries in the late 19th century.

At the time, I spoke with several experts in the field of research known as “education in emergencies.” They gave their predictions for the long-term implications of school closures in the United States based on the research on previous school interruptions caused by war, refugee crises, natural disasters and previous epidemics.

Two years on, schools are open and masks are coming off in most places, restoring a feeling of normalcy.