The United States Constitution is the set of rules that all of the government in the United States must follow. It does not allow the government to support one religion more than any other religion. Schools run by the government (public schools) cannot teach one type of religion as being true. In "Edwards v. Aguillard", the United States Supreme Court said that creationism was not science. It said it was religious, because it tried to explain things using stories from the Bible. The Supreme Court said that creationism could not be taught in public schools. But some people said intelligent design was not creationism.