In this Tuesday, March 16, 2021, photo, parents pick up school materials outside the Aurora Elementary School in Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the COVID-19 pandemic. (AP Photo/Damian Dovarganes)

In this Tuesday, March 16, 2021, photo, parents keep their social distance as they pick up school materials outside the Aurora Elementary School in Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the coronavirus pandemic. (AP Photo/Damian Dovarganes)

In this Tuesday, March 16, 2021, photo, school buses remain parked in Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the coronavirus pandemic. (AP Photo/Damian Dovarganes)

FILE _ In this Feb. 16, 2021 file photo, California Gov. Gavin Newsom, left, talks to Los Angeles Mayor Eric Garcetti during a news conference at a joint state and federal COVID-19 vaccination site set up on the campus of California State University of Los Angeles in Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the coronavirus pandemic. (AP Photo/Jae C. Hong, File)

FILE - In this Jan. 22, 2019 file photo Los Angeles Mayor Eric Garcetti, center flanked by Austin Beutner, Superintendent of the Los Angeles Unified School District, right, and United Teachers Los Angeles, Union President Alex Caputo-Pearl, left, during a news conference at City Hall downtown Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the coronavirus pandemic. (AP Photo/Richard Vogel, File)

In this Tuesday, March 16, 2021, photo, parents and students line up to pick up school materials outside the Aurora Elementary School in Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the coronavirus pandemic. (AP Photo/Damian Dovarganes)

In this Tuesday, March 16, 2021, photo, parents pick up school materials outside the Aurora Elementary School in Los Angeles. Students in California classrooms can sit 3 feet apart instead of 6 under new guidelines adopted by the state as school officials figure out how to reopen campuses closed for a year during the coronavirus pandemic. (AP Photo/Damian Dovarganes)