The document summarizes key Supreme Court cases related to freedom of religion in the United States under the First Amendment. It discusses the Establishment Clause and how it prohibits state establishment of religion but allows some forms of aid to religious schools. It introduces the Lemon Test for determining violations of the Establishment Clause. It also covers the Free Exercise Clause, noting religious beliefs are protected but practices can be limited if they violate public health, safety or morals. Some cases protected certain religious practices while others placed limits.