The Establishment Clause, found in The First Amendment to the U.S. Constitution, prohibits the government from making laws respecting an establishment of religion, or laws that unduly favor one religion over another, and it guarantees people's right to freely exercise their religion. So, if a student prays alone in his public school cafeteria before lunch, the activity of that student is accepted and protected under the establishment clause because this clause guarantees people's freedom to exercise their religion, whether it is to pray, praise, carry religion symbols, or any other form of expression that do not harm others.