Difference between professor and school principal in Korean
교수·교장

교수professor
A professor (교수) is a teacher at a college or university. This word is used when you talk about someone who teaches university students. It does not mean a teacher in elementary, middle, or high school.

교장school principal
The word "교장" means the school principal, the person in charge of a school. You use it when talking about the leader of the school and school decisions. In polite Korean, people often say "교장 선생님" when speaking to or about the principal.
The difference
professor (교수) and school principal (교장) are nearby Korean vocabulary items learners often meet together. Use “professor” when A professor (교수) is a teacher at a college or university. This word is used when you talk about someone who teaches university students.… Use “school principal” when The word "교장" means the school principal, the person in charge of a school. You use it when talking about the leader of the school and sc…