FILE - In this Dec. 7, 2020, file photo, a parent, center, completes a form granting permission for random COVID-19 testing for students as he arrives with his daughter, left, at P.S. 134 Henrietta Szold Elementary School, in New York. Children are having their noses swabbed or saliva sampled at school to test for the coronavirus in cities such as Baltimore, New York and Chicago. As more children return to school buildings this spring, widely varying approaches have emerged on how and whether to test students and staff members for the virus. (AP Photo/Mark Lennihan, File)