Students are each given a note with a calculation written on it. All of the notes are different but the answers of the calculations are paired. The students go around talking to each other and exchange notes with those that they need. When the teacher shouts ‘stop’ the aim is to work out the calculation and get together with the partner who has got the same answer. The pair that get together quickest get a point. Then the notes are folded together again and the activity is repeated. The activity can be done in lots of different subjects, the requirements being that two notes match.