Final answer:
The fact that prayer continues in some public schools, despite being declared unconstitutional by the Supreme Court, is a violation of the Establishment Clause.
Step-by-step explanation:
The fact that prayer continues in some public schools, despite being declared unconstitutional by the Supreme Court, is an example of a violation of the Establishment Clause. The Establishment Clause of the First Amendment prohibits the government from establishing or endorsing any religion.
When prayer is allowed in public schools, it is seen as government endorsement of a particular religious practice, which goes against the constitutional principle of separation of church and state.