Find the differences

     This is a well-known activity and a classic example of the principle of an "information gap" in communicative activities. If you put two pictures in front of a pair of students and tell them to talk about the differences, there is not much to motivate them. But if you arrange the activity so that each student only sees one picture, then an information gap is created. Cooperating with their partner to identify the differences becomes an act of genuine communication.