ASSOCIATED PRESS
Michael Bayard, far left, Ashleigh Bayard, Shelli Boggs and Dawn Oliphant, hold signs outside Queen Creek High School in Queen Creek, Ariz., on Monday to welcome students back on the first day of school. The first day of school, a normally happy ritual, was fraught with conflict Monday at some schools opening in Arizona, echoing debates across the country over the risks of holding all in-person instruction amid the coronavirus pandemic.