Which is correct: AT SCHOOL or IN SCHOOL?

Advanced English Grammar Course

We actually use both in school and at school, for slightly different situations.

At school means the person is literally, physically, inside the school.

(conversation at 2:00 PM)

“Where’s John?”

“He’s at school. His classes finish at 3:30.”

In school means the person is studying in general (usually at college or university) but not necessarily inside the school building at that moment.

“My husband doesn’t have a job because he’s in school. He’s studying law.”

I can say this sentence even if my husband is not at the school at that moment.

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