Create a game using magnetic letters on a whiteboard. Group the present-tense regular endings for all AR verbs: “o," “as,” “a,” “amos” and “ais." Have another group of magnetic letters with the pronouns that match each ending. At first, when you are introducing this conjugation to your students, color-match the pronoun and the correct ending. Then write five common AR verb stems on the whiteboard. Put a pronoun in front of each verb stem and ask the students to place the correct ending on the verb stem.
Create a set of cards in pairs. One half of the pair has a sentence using a common AR verb, with the verb itself indicated only in the infinitive. The match card has the correct conjugation of that verb to fit the sentence. Include in the set some wild cards that use the right verb, but with the wrong ending. Play this game with your students like a conventional memory game, in which they get to turn over two cards at a time. If they uncover -- and recognize -- a match, they get to keep the pair.
It’s important for your students to be able to conjugate correctly not just on paper but also while speaking. Prepare a set of simple questions in Spanish that use AR verbs with which your students are familiar. Use a different pronoun for each one so that the answers will use a different ending. Arrange your students into teams and ask the questions to each team in turn, giving five seconds of thinking time. If they can’t answer using the correct form of the verb, the question goes to the other team.
You can find lots of resources on the Web to help your students practice their AR verb endings. Training tools and games allow them to keep score as they add endings to common AR verb roots. For instance, the Learn Spanish Today website has a Burrito Builder game; if the student types the correct verb form to match the English prompt, he earns ingredients for his virtual burrito. Use this type of activity as an adjunct to speaking games to give your students a variety of kinds of practice. If you have the time and resources, you can allow students to play these games in class; if not, they can be a fun way to encourage homework.