What case ruled that schools have the authority to limit student speech?

The ruling that schools have the authority to limit student speech is primarily established in Hazelwood School District v. Kuhlmeier. In this case, the Supreme Court held that schools could censor student newspapers and other forms of student expression when the content is inconsistent with the educational mission of the school. The Court reasoned that schools have the responsibility to ensure a supportive educational environment, which may require regulating student speech in certain circumstances.

While Tinker v. Des Moines Independent Community School District is highly significant in establishing that students do not lose their First Amendment rights when they enter school grounds, it allows for some limitations on speech that might disrupt educational activities. However, Hazelwood is more directly aligned with the authority of schools to impose restrictions on speech, particularly in school-sponsored activities.

New Jersey v. TLO deals with search and seizure in the context of school officials and does not focus on the regulation of speech. Texas v. Johnson is unrelated to school speech, as it addresses flag desecration under the First Amendment's protection of free speech. Therefore, the specific ruling regarding the authority to limit student speech points more conclusively to Hazelwood School District v. Kuhlmeier.