So every other Friday I give my students a verb quiz. I give them 3 verbs to study and the day of the quiz, I tell them which one they are to conjugate in all tenses in the yo form. I give them 6 minutes to take the quiz and we move on to the lesson. This document is a key that I give them to use as a study tool. The first page is the endings of -ar verbs and the second is the endings for -er / -ir verbs.