 Which is correct, in school, or at school, from espressoenglish.net? Both are correct, but we use them in different situations. At school means the person is literally physically inside the school. For example, if this conversation happens at 2 o'clock pm. Where's John? He's at school. His class is finished at 3.30 pm. John is at school. He is inside the school at this moment. In school means the person is studying in general, usually at college or university, but is not necessarily inside the school at that moment. For example, you could say, my husband doesn't have a job because he's in school. He's studying law. This means that my husband is a university student, but not necessarily that he is at the university at this moment. Thanks for watching English Tips from Espresso English. If you liked this video, please share it.