Teacher teaches in a school.
Meaning: This sentence describes a person whose job is to teach giving instruction or knowledge to someone inside or within a place where children and young people go to learn.
Choice of Words: Teacher is a person whose job is to teach. Teaches means to give instruction or knowledge to someone. In means inside or within a place or area. A is used before a singular noun to refer to any one of a class of people or things. School is a place where children and young people go to learn.
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Related Expressions