"Are you in school?"

Translation: Az iskolában vagy?

[Arcaeca]

Why is "az" required here?

[96314081311257]

It isn't, report it, please.

[szilbog]

If you are a student, normally you go to the same school day by day. So if I ask where are you, maybe in school, I know in which school.
So I can also ask: "Az iskolában vagy?" But "Iskolában vagy?" is also good.
(If duo says not, we have to report it).

[wyqtor]

Vagy az iskolában? - does this sound natural?

[bajczand]

No. This is not correct.

[GergelyMol1]

Iskolában vagy?