Chicago Public School students will spend their 10th day out of class Wednesday after Mayor Lori Lightfoot accused union leaders of “moving the goalposts” with demands that she support legislation to end mayoral control of CPS as well as a state bill that would lift restrictions on what issues the union can strike over. CPS CEO Janice Jackson said the two sides were also far apart on the union’s demand for an additional 30 minutes of prep time for elementary school teachers. Jackson said that was unacceptable because it would shorten the school day. “What’s holding this up now is a set of political issues, and an effort to try and cut instructional time, which we cannot agree to,” Jackson said.