The document discusses communicative interaction in language learning and different activity types teachers can use. Communicative interaction describes how language is used interactively between members of an organization. The teacher's goal is to give students opportunities to practice communicating in the target language. Teachers should design tasks where students share information about themselves in the language. There are many activity types that provide speaking, listening, writing and reading practice like games, role-plays and simulations. These include repetition drills, asking and answering questions about maps, and having students assume roles to facilitate and monitor group work.