If Miss Wang is an unmarried woman, is her name Miss Wang? Wang.
If Mr. Wang is a man, whether he is married or not, his name is Mr. Wang.
In English, teacher XXX is generally not called teacher XXX, but also called Mr. and Ms. according to the specific situation. Generally, the word "teacher" is not used alone, and "Good morning, teacher" is not a very common expression in China's class.
Of course, in the case of good relations, some important people will also be called informally. Most people call them Mr/Ms, or they can call them by their first names (Jack, Lily). It can be seen that the first name or surname can reflect the distance of the relationship to a certain extent.