FILE - In this Wednesday, Jan. 30, 2019, file photo, teachers from the Denver Public Schools carry placards as they wait to march after a rally in support of a strike outside the State Capitol in Denver. Denver teachers are planning to strike Monday, Feb. 11, 2019 after failed negotiations with the school district over base pay.
FILE - In this Wednesday, Jan. 30, 2019, file photo, teachers from the Denver Public Schools carry placards as they wait to march after a rally in support of a strike outside the State Capitol in Denver. Denver teachers are planning to strike Monday, Feb. 11, 2019 after failed negotiations with the school district over base pay. David Zalubowski, File AP Photo
FILE - In this Wednesday, Jan. 30, 2019, file photo, teachers from the Denver Public Schools carry placards as they wait to march after a rally in support of a strike outside the State Capitol in Denver. Denver teachers are planning to strike Monday, Feb. 11, 2019 after failed negotiations with the school district over base pay. David Zalubowski, File AP Photo