Found in the U.S. Constitution, the Establishment Clause prevents the government from passing laws that favor one religious practice over another. 
In recent times, however, some states have begun passing laws requiring the Ten Commandments to be featured in classrooms and sometimes in government buildings. How legal is this, though?
Come yap about it with me and our guest speaker, Dr. Phillip Marcin, on this episode of Civic Chit-Chat!