See what we said about safety in #7. That’s not a legitimate excuse for abridging student speech. Otherwise, a student has significant rights. The ACLU says, “Sometimes schools try to silence students who are open about their sexual orientation. But you have a Constitutional right to be out of the closet at school if you want to be. Sometimes schools punish students for talking about being gay. Sometimes schools censor students for wearing gay-themed t-shirts, even when the shirts aren't obscene and other students are allowed to wear t-shirts expressing their views on political or cultural issues. In Tinker v. Des Moines, over 30 years ago, the U.S. Supreme Court ruled that students don't ‘shed their constitutional rights to freedom of speech at the schoolhouse gate.’"¹³
Of course, regardless of what students choose to say, they don’t have a right to express themselves in a way that causes substantial disruptions to the school. [See Question 3].

¹³ See the ACLU’s Know Your Rights! A Quick Guide for LGBT High School Students http://www.aclu.org/images/asset_upload_file494_28337.pdf  ; see also The ACLU of Washington State, Know Your Rights: A Guide for Public School Students in Washington (June 2007): http://www.aclu-wa.org/library_files/Guide for Public School Students.pdf