This is an all-class mixer activity. Each student sheet has 5 statements. "Les élèves doivent étudier." All sentences use the present tense of devoir. Students mingle, trying to find their twin (the other person who has all 5 of the same statements, though in a different order). Students need to write the name of their twin and then find something that they have in common (related to the vocabulary and grammar of this activity). This activity uses both meanings of devoir - to have to and to owe.