Mayor Lori Lightfoot (left) and Chicago Public Schools CEO Janice Jackson (second from left) visit a preschool classroom at Dawes Elementary School in Chicago on Jan. 11. Ashlee Rezin Garcia/AP hide caption
teacher strike
Teacher in Chicago have announced that they will go on strike. John Gress/Corbis via Getty Images hide caption
Teachers, staff and their supporters marched through downtown Chicago on Monday to show support for the teachers union. Teresa Crawford/AP hide caption
Chicago Teachers Union members cheer at a rally ahead of a potential strike. Scott Heins/Getty Images hide caption
West Virginia teachers went on strike Tuesday to pressure the state legislature to reject funding for private schools. John Raby/AP hide caption
Teachers carry placards as they walk a picket line outside South High School early Monday in Denver. A new lawsuit alleges students with disabilities will be harmed by the strike. David Zalubowski/AP hide caption
Denver teachers carry placards as they wait to march after a rally in support of a strike outside the state Capitol last month. Denver schoolteachers are going on strike over how their base pay is calculated. David Zalubowski/AP hide caption