Tinker v. Des Moines Precedents:

1. Waugh v. Mississippi University (1915): the Court ruled that the states control institutions they established and that the state can prohibit things it believes distracts from the purpose which the state desired to exist.
2. Meyer v. Nebraska (1923): the Court ruled that laws which interfered with the liberty of teacher, student, and parent were unconstitutional.
3. Cox v. Louisiana (1965): the Supreme Court ruled that the rights of free speech and assembly do not mean that anyone with opinions or beliefs to express may address a group at any public place and at any time.
4. Hammond v. South Carolina State College (1967): it was ruled that people in public schools are protected by constitutional rights.