Chicago Teachers Union members picket prior to a Chicago Board of Education meeting on Wednesday, Aug. 22, 2012 in Chicago. The union called for fair contracts with higher pay for its teachers. (AP Photo/Sitthixay Ditthavong)

Associated Press
Chicago Teachers Union members picket prior to a Chicago Board of Education meeting on Wednesday, Aug. 22, 2012 in Chicago. The union called for fair contracts with higher pay for its teachers. (AP Photo/Sitthixay Ditthavong)
Chicago Teachers Union members picket prior to a Chicago Board of Education meeting on Wednesday, Aug. 22, 2012 in Chicago. The union called for fair contracts with higher pay for its teachers. (AP Photo/Sitthixay Ditthavong)
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