How do you say how was school today in french?

There are a few ways to say "how was school today" in French, depending on the level of formality and who you're talking to:

Formal:

* Comment s'est passée ta journée à l'école aujourd'hui ? (How did your day at school go today?)

Informal:

* Comment c'était l'école aujourd'hui ? (How was school today?)

* Alors, l'école, ça s'est bien passé ? (So, how was school?)

* C'était comment à l'école ? (How was it at school?)

You can also use a question like "Qu'est-ce que tu as fait à l'école aujourd'hui ?" (What did you do at school today?) to spark a conversation about their school day.