Let's break it down:
* Fuiste: This is the past tense of the verb "ir" (to go) in the informal "tú" form. It means "you went."
* Para: This means "for" or "to" and is used to indicate the destination.
* Escuela: This means "school."
* Hoy: This means "today."
So, the whole sentence asks whether the person went to school on the current day.