This isn’t a first amendment challenge. Expression is regulated at the discretion of the school the moment you walk in. That is settled. You don’t have full first amendment rights at school. Full stop.
In the school context, the United States Supreme Court has identified three major relevant considerations:[6]
The extent to which the student speech in question poses a substantial threat of disruption (Tinker v. Des Moines Indep. Cmty. Sch. Dist.).
Whether the speech is offensive to prevailing community standards (Bethel School District v. Fraser).
Whether the speech, if allowed as part of a school activity or function, would be contrary to the basic educational mission of the school (Hazelwood v. Kuhlmeier).
