(Updated at 4:00 pm on Sept. 6, 2018, to add comments from Evelyn Cook, a middle school teacher in Tacoma, and Tacoma Public Schools spokesman Dan Voelpel.) The first day of school in Tacoma was canceled on Thursday because teachers and other school staff in the state’s fourth-biggest district went on strike. That comes after the district and the Tacoma Education Association failed to reach an agreement over salary increases for the coming school year. Members of the union voted by about 97