You are pretty sure a teacher would never do that? Because????????? Any number of teachers would be capable of doing that, any person who was panicked and was a sort of rule-keeper person, any number of people without common sense or the courtesy to ask what was going on.
A friend of mine said that when she was in third grade, she was assigned an arithmetic book that had been bound incorrectly - the cover was on upside down. She turned the book to read the text right side up, and the teacher strode over, wrested it from her hands and turned it the other way - twice - during the class. At that age, she was too cowed by an authority figure to defend herself.