Engel v. Vitale: A Supreme Court case that ruled against mandatory prayer in public schools, further upholding the separation of church and state.
Lemon Test: A three-part test established by Lemon v. Kurtzman to determine whether a law or action violates the Establishment Clause.
Free Exercise Clause: A provision in the First Amendment that protects individuals' rights to practice their chosen religion without interference from the government.