- Plessy v. Ferguson involved Homer Plessy being arrested for refusing to leave a "whites only" train car as required by Louisiana law. The Supreme Court ruled that the law requiring racial segregation was constitutional under the doctrine of "separate but equal." - Tinker v. Des Moines established that students have free speech rights in school, but that speech can be regulated if it causes a substantial disruption to the learning environment. The case involved students suspended for wearing black armbands to protest the Vietnam War. - Texas v. Johnson overturned a Texas law prohibiting flag desecration, ruling that burning the American flag as a form of political protest is a protected expressive act under the First