Historically, the United States has respected each religion. That means public schools can’t support one religion, because public schools have supports from citizens. So schools must consider each student’s background and not insist on one religion in their students.
And public schools should be open to each idea. The schools should be places to discuss and accept different values.
There are many types of people and religions in the U.S. Even in Christianity, you can find several sects. In First Amendment to the United States Constitution, Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof… So following it, schools and teachers can’t make a situation to force students to pray for God and lead to make students believe God.
Some people sued over the fact they can’t get the right for their ideas. One example is Kaylee Cole in Louisiana. she felt she didn’t need to follow the custom of religion at school like praying in the morning with other students. She respects her beliefs. Her science teacher says students shouldn’t believe “evolution”, but "Adam and Eve, not the big bang." She felt the education is secular for her education.
For the facts, some people believe the school should be open to everyone and ideas, regardless of their religions.