CHICAGO, IL - SEPTEMBER 15: Chicago Teachers Union President Karen Lewis speaks to supporters during a rally at Union Park September 15, 2012 in Chicago, Illinois. An estimated 25,000 striking Chicago teachers and their supporters gathered in the park in a show of solidarity as negotiations on a labor contract continue. Yesterday Lewis reported the "framework" for an agreement has been reached and union delegates are expected to decide tomorrow if they should end the strike. More than 26,000 teachers and support staff walked off of their jobs on September 10 after the union failed to reach an agreement with the city on compensation, benefits and job security. With about 350,000 students, the Chicago school district is the third largest in the United States. (Photo by Scott Olson/Getty Images)
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