Tinker v. Des Moines School District is a landmark Supreme Court case from 1969 that established the constitutional rights of students in public schools, specifically regarding their First Amendment rights to free speech. The case arose when students wore black armbands to protest the Vietnam War and were suspended by the school. The Court ruled that students do not 'shed their constitutional rights to freedom of speech or expression at the schoolhouse gate', reinforcing the idea that students have the right to express themselves as long as it does not disrupt the educational process.