Problem solving activities are useful for rising cooperative interaction in order to practice L2 in an authentic way. This kind of activities have different advantages that help students work in a more collective and profitable way; some of these are the outcomes we can get from the students because of the number of people involved, we can get more ideas. Students may share their knowledge and own points of view in order to solve the problem. Besides, the exchange of ideas may act as a motivational resource to encourage learners to develop their concepts in a more extensive way and to consider others point of view. Furthermore, a shared responsibility helps individuals to judge, recognize and reflect on the options given to solve the problem.