Virginia: "Does that mean I'll get an F if I don't answer the Darwin test questions correctly?"
Teacher: "Yes Virginia, there are right answers and wrong answers. Your religious beliefs are not the right answer in this class."
Or in a religion class: "Does this mean I'll get an F if I don't answer the religion questions correctly?"
Teacher: "Of course, that's how it works for all tests."
Student: "But I don't believe in that religion."
Teacher: "It doesn't matter, you just have to know the subject, not believe. It has no bearing on your personal beliefs."
Of course it depends on the teacher, as you have bad ones on both sides of the issue who try to change the beliefs of the students. When I took a course in Islam in college, it was definitely understood that we were dispassionately studying a subject, not being proselytized.