In this Sept. 9, 2020, file photo, a student wears a protective masks as they arrive for classes at the Immaculate Conception School while observing COVID-19 prevention protocols in The Bronx borough of New York. New York City has again delayed the planned start of in-person learning for most of the more than 1 million students in its public school system. Mayor Bill de Blasio announced Thursday, Sept. 17, that most elementary school students would do remote-only learning until Sept. 29. Middle and high schools would stay remote through Oct. 1.(AP Photo/John Minchillo)