What ruling in school decided that prayer is unconstitutional in 1960?

In 1962, the U.S. Supreme Court ruled in Engel v. Vitale that a New York State law allowing a short, voluntary prayer for recitation at the start of each school day violated the Establishment Clause of the First Amendment. The Court held that by promoting a specific prayer, the state was effectively endorsing religion, thus making the practice unconstitutional in public schools. This landmark decision reinforced the principle of separation of church and state in the context of public education.