TRENTO, ITALY - SEPTEMBER 15: General view of students and a university teacher wearing protective masks inside a university classroom at the University of Trento on September 15, 2020 in Trento, Italy.
Scheduled entrances and masks for teachers and SAN FRANCISCO - One desperate California school district is sending flyers home in students’ lunchboxes, telling parents it’s "now hiring." Elsewhere, principals are filling in as crossing guards, teachers are being offered signing bonuses and schools are moving back to online learning.Now that schools have welcomed students back to classrooms, they face a new challenge: a shortage of teachers and staff the likes of which some districts say they have never seen.Public schools have struggled for.