Learn French: Le collège est dans le village. - The middle school is in the village.

In French, le collège is a false friend. It specifically refers to middle school for younger teenagers. If you want to talk about college or university, you would use l'université. High school is le lycée.

Since this lesson is about au, could I say Le collège est au village instead of dans le village?

You could, but dans le village is usually preferred when talking about a building's physical location. We use dans (inside) to emphasize that the school is physically located within the borders of the village. Au village translates more closely to at the village in a general sense.

Is village masculine even though it ends in an e?

Yes! While many French words ending in -e are feminine, words that end in the letters -age (like le village, le fromage, and le voyage) are almost always masculine.

Why is the verb spelled est and not es?

Est is the he, she, or it form of the verb être (to be). Because le collège is a singular thing (it), we use est. You only use es when talking directly to someone using tu (you).