I was watching this movie that was about a story of a teacher and a prep school students Even though he was a teacher, he kept calling (male) students "Sir", such as in " Does anyone have a question?... you, sir." Seemed like over-mannered to me, but suddenly I was wondering, When a teacher wants call a female student (Not adult) in this manner, would he want to say "ma'am"? Like "would anyone answer this question?.........(pointing at someone) you, ma'am!" (she panics) If not, what would a teacher call a young female student in a corteous manner?