Which case ruled on the rights of students in public schools regarding free speech?

The ruling in Tinker v. Des Moines is a landmark decision that addressed the rights of students in public schools concerning free speech. The case involved students who wore black armbands to school as a form of protest against the Vietnam War. The Supreme Court ruled that students do not "shed their constitutional rights to freedom of speech or expression at the schoolhouse gate." This decision emphasized that student expression is protected under the First Amendment, provided it does not disrupt the educational process.

In contrast, the other cases listed do not specifically deal with student free speech rights in an educational setting. Furman v. Georgia focuses on the death penalty and its application, Engel v. Vitale pertains to the separation of church and state in public schools, and Baker v. Carr is concerned with legislative districting and representation in the context of the equal protection clause. Therefore, Tinker v. Des Moines is the correct case to reference when discussing students' rights to free speech in public schools.