[beGlad]

"To gain the benefit of a public education, you must follow whatever rules they establish."

That's an interesting argument. In Tinker vs. DesMoines, however, the Supreme Court ruled that teachers and students do not shed their constitutional freedom of speech at the school door. I wonder what ruling since then has overturned this right?

[general_re]

Tinker has never been directly overruled, but in the subsequent years since then, the Court has narrowed its scope somewhat. See Bethel School District No. 403 v. Fraser, 478 US 675 (1986), and especially Hazelwood School District v. Kuhlmeier, 484 US 260 (1988).