What is the Supreme Courts decision on teaching Evolution and Creationism in the classroom?

The teaching of creationism in public schools has stood trial a number of times. At least two of such cases came before the US Supreme Court: Epperson v. Arkansas, 1968; Edwards v. Aguillard, 1987. In both instances, the US Supreme Court ruled against the statutes promoted by the creationist groupings concerned. In a number of other cases before district courts and federal courts, rulings were also against any statute that would require a religiously based modification to the biology curriculum, stating that such statutes are unconstitutional as they violate the establishment clause of the First Amendment of the US Constitution.