My HS biology teacher opened the year with a statement that went something like this:
“In this class I teach the theory of evolution. For the purposes of this class, all test questions should be answered in accordance with this theory, as presented in class and the textbook. Your personal beliefs outside of this class do not have any bearing on the correct test answers.”
He was a christian, and a pretty good teacher.
My students ALWAYS wanted to know what I thought about it. I told them my opinion wasn’t germane, they needed to learn what the State of TX was going to test them on, and furthermore if they disagreed with what they were being taught, they would have a lot better chance to refute it in an argument if they understood what it said. When someone says something like, “If we came from monkeys how come there are still monkeys” to someone as a refutation of Darwins theory, they immediately look stupid and uninformed.