Oklahoma recently passed a law requiring all schools and teachers to have a Christian Bible in their classroom and teach about it and the Ten Commandments(see picture below). Texas, Utah, and Louisiana require all teachers to have the Ten Commandments posted in their classroom. The US constitutions First Amendment guarantees "freedom of religion" and also forbids the government from establishing a religion. Public schools are a government sponsored organization. In 1879, the US Supreme Court used the phrase "separation of church and state" to describe the meaning of the First Amendment's religion clauses. Separation of church and state means that the government should not interfere with religion and that religion should not control each other.
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I personally don't think that schools should be required to teach a certain religion especially if there are people who don't neccesarily agree to that religion. I think that people can have their own opinions and should be able to support any religion that they want. However, I think that as a Christian myself that there could be some benefits in having a bible or the ten commandments. For example, it could really help people who might not have a close relationship with God better themselves as people. Overall I think that many people would be oppsosed to requiring to have a bible or the ten commandments in classrooms, and I think that people should not be "forced" under a religion, and can have their own opinions about what religion they support.
I strongly believe that teachers should not be able to teach from the Bible and Ten Commandments. If they do it could be pressuring some students into joining a certain religion. Which could cause some trouble. Oklahoma might have passed a law but that doesn't mean it is okay. Most students join classes to learn about the topic they joined the class for. Maybe if there were certain classes, then maybe. But as of now I think that it is to big of an issue to decide on.