This actually happened in a youth ministry class at Hannibal-LaGrange College in Missouri.
I left work early so I could have some uninterrupted study time right before the final in my Youth Issues class.
When I got to class, everybody was doing their last-minute studying. The teacher came in and said he would review with us for just a little bit before the test. We went through the review, most of it right on the study guide, but there were some things he was reviewing that I had never heard of. When questioned about it, he said that they were in the book and we were responsible for everything in the book. We couldn't really argue with that.
Finally, it was time to take the test.
An atheist was quite incensed over the preparation for Easter and Passover holidays and decided to contact the local ACLU about the discrimination inflicted on atheists by the constant celebrations afforded to Christians and Jews with all their holidays while the atheists had no holidays for them to celebrate.