United States
449 U.S. 39 (1980), the Supreme Court ruled that a Kentucky law that required the posting of the Ten Commandments on the wall of every public-school classroom in the state violated the establishment clause of the First Amendment because the purpose of the display was essentially religious.
United States
370 U.S. 421 (1962), was a landmark United States Supreme Court case in which the Court ruled that it is unconstitutional for state officials to compose an official school prayer and encourage its recitation in public schools, due to violation of the First Amendment. The ruling has been the subject of intense debate.
