This about sums it up...
From: Chicago Tribune (emphasis mine)
Chicago teachers will remain on strike at least through Tuesday after members of the union’s House of Delegates said they wanted more time to review a tentative deal reached over the weekend.
After meeting with teachers for more than two hours, Chicago Teachers Union president Karen Lewis said delegates could vote as early as Tuesday to end the strike, meaning classes would not resume before Wednesday.
Members want the additional time to digest the details of the contract offer, Lewis said.
"Our members are not happy," Lewis said. "They want to know if there is anything more they can get."
She added: "They feel rushed." read the rest