single word requests - What do students call their teacher in class?

Well, years ago I was an English teacher in an English Teaching Institute. In the country I live, students call their teachers by saying "Mr. Teacher" or "Teacher" (literally translated) in schools. In places other than schools and universities, students also can call their teacher by saying "Mr. X", and in universities they call their professor by saying "Dr." and "Master". It was always question for me that in an English class what should I be called by my students because I didn't know what American students call their teacher in class.

To sum up my question, what do students call their teacher in class in a typical school in the U.S.? Is it different for the students of primary school and secondary school? I would be glad to hear the same question about England and Australia.

Answer

In the U.S. the variety of forms of address used is quite broad. I think that at the college level, the honorific Professor is most common, after which the honorific-plus-surname form Professor X (for example, Professor Johnson) is common, followed by the form Doctor X (for example, Doctor Johnson). In graduate school, many students address professors by their first names, particularly in seminars or less formal groups. When not present, professors most often are called by their surnames (for example, Johnson), and less frequently by first name or by honorific-plus-surname forms.

At the high school level, forms like Mr. X, Mrs. X, Ms X, and Miss X are common, where X is a surname. Both in class and out, popular teachers often are referred to by title plus first letter of surname; for example, a Mrs. Thompson might be called Mrs. T.