Edwards v. Aguillard (1987) said a state law mandating teaching “creation
science” alongside evolution in public school violated the First
Amendment’s establishment clause.
Creationism / Intelligent Design and Separation of Church and State
Creationism and intelligent design are religious beliefs that have sometimes resulted in questions about what can be taught in public schools about the origin of life without violating the First Amendment's "establishment" clause, or separation of church and state.
Following are court cases related to these issues: