**FILE** Thousands of public school teachers rally Sept. 10, 2012, outside the Chicago Public Schools district headquarters on the first day of strike action over teachers' contracts in Chicago. (Associated Press)

Photo by: Sitthixay Ditthavong

**FILE** Thousands of public school teachers rally Sept. 10, 2012, outside the Chicago Public Schools district headquarters on the first day of strike action over teachers' contracts in Chicago. (Associated Press)