| Term | Definition |
| Everson v. BOE (1947) | Reimbursing parents of Catholic school students for busing expenses |
| Engel v. Vitale (1962) | School-sanctioned prayer unconstitutional |
| Abbington School District v. Schempp (1963) | School-sanctioned bible-reading unconstitutional |
| Lemon v. Kurtzman (1971) | Govt financing religious schools unconstitutional; estd Lemon Test |
| Lemon Test: first requirement | Primarily a secular purpose |
| Lemon Test: second requirement | Neutral in religion |
| Lemon Test: third requirement | No excessive entanglement of govt &religion |
| Lynch v. Donnelly (1984) | Religious xmas displays permitted if secular displays included |
| Wallace v. Jaffree (1985) | "Voluntary prayer" unconstitutional; "Moment of silence" |
| Edwards v. Aguillard (1987) | Public schools teaching evolution cannot be forced to teach creationism |
| Westside School District v. Mergens (1990) | Religious groups in public schools have equal access to facilities |
| Lee v. Weisman (1992) | Clergy-led prayer @public high school graduation unconstitutional |
| Santa Fe Independent School v. DOE (2002) | High school students reading prayer @athletic events unconstitutional |
| Establishment Clause | Prohibits the establishment of a national religion |