What does the Supreme Court tell us, in a nutshell about students’ freedom of expression in schools, taking into consideration, Tinker v. Des Moines, Bethel v. Frasier, and Hazelwood v. Kuhlmeier?

What does the Supreme Court tell us, in a nutshell (no more than 2 sentences), about students’ freedom of expression in schools, taking into consideration, Tinker v. Des Moines, Bethel v. Frasier, and Hazelwood v. Kuhlmeier? Within your synthesis, use the following vocabulary words or clauses within proper context: “closely akin to pure speech”, discipline, and curriculum.”