The document summarizes the landmark Supreme Court case Tinker v. Des Moines from 1969. It details how several students wore black armbands to school to protest the Vietnam War and were suspended. The ACLU filed a complaint and the Supreme Court eventually ruled that students have the right to freedom of expression as long as it does not cause substantial disruption or infringe on others' rights, establishing that students do not shed their constitutional rights at the schoolhouse gate. The decision shaped school administrators' ability to limit student expression.