** FILE ** A handful of teachers picket Sept. 17, 2012, outside Shoop Elementary School in Chicago, as a strike by Chicago Teachers Union members headed into its second week. (Associated Press)

Photo by: M. Spencer Green

** FILE ** A handful of teachers picket Sept. 17, 2012, outside Shoop Elementary School in Chicago, as a strike by Chicago Teachers Union members headed into its second week. (Associated Press)