CHICAGO (AP) — Chicago Public Schools leaders have extended remote learning for two more and called for a “48-hour cooling-off period” amid negotiations with the teachers’ union. They’re citing progress but not a full agreement on COVID-19 safety plans for returning to schools. Mayor Lori Lightfoot says teachers would not be locked out of teaching platforms for failing to show up in person “as a gesture of good faith,” walking back an earlier threat that had prompted union officials to entertain a strike. Both sides have have been negotiating for months on a safety plan.