Public school teachers in Chicago remain out of the classroom for a fifth day today amid signs they are close to a deal that would bring their historic strike to an end. Chicago Teachers Union President Karen Lewis indicated a deal was imminent, but classes could not resume until at least Monday because the union would need time to approve an end to the strike. Negotiations have centered on controversial school reforms backed by Chicago Mayor Rahm Emanuel, including a proposed teacher evaluation process the union says relies too heavily on standardized testing.