Learn to speak in sound bites. If you subscribe to email discussion lists, post a notice there about your situation and ask for advice, encouragement, or specific help. Over and over again I've been amazed at the lengths to which strangers on the net will go to provide help. I've also reached Nikki Giovanni and others through similar contacts. Contact your teachers' union and see if contractual violations are involved in the censorship.
Some unions have strong intellectual freedom clauses that can be invoked.
In major cases with egregious violations, the unions occasionally provide legal representation. In my district the NEA affiliate recently represented an advisor removed from her post in an attempt to silence a student newspaper. Tell your story and ask them to help carry it throughout the community by inviting you to speak at local civic clubs and by writing letters to the editor and to school officials and school board members. Write professionally about the experience. Christenbury, Leila, ed.