The Chicago Teachers Union voted on Sunday to continue remote work only, in defiance of the school district’s plans for K-8 teachers and staff to return to classrooms this week. Here, a sign in front of Martin Luther King, Jr. Elementary School in September.

CHICAGO, ILLINOIS – SEPTEMBER 08: A sign in front of King Elementary School encourages students to participate in remote learning on September 08, 2020 in Chicago, Illinois. Students at King Elementary and the rest of Chicago public schools started classes today with students being taught remotely because of COVID-19 concerns. (Photo by Scott Olson/Getty Images)