The Boston Teachers Union Tuesday accused the School Department of intimidating teachers who speak with the news media and of trying to infringe upon their First Amendment rights.┬áThe teachers union, which has been locked in protracted contract talks with the school system, raised the concerns after its says an eighth-grade civics teacher at the McCormack Middle School in Dorchester was called into a supervisor’s office after being interviewed by the Bay State Banner for a recent story on budget cuts.