The case of Maria provides evidence on how important this collaborative project was for the practice of this teacher. Having the possibility to plan, review and assess new teaching experiences made her understand the relevance of seeking new forms of work in the classroom. Before the project, she was likely to speak most of the time in a lesson, controlling its dynamics in a rather strict way. Her concern to keep students interested and to cover all the official curriculum, explains the sort of direct confirmation questions that she used. In the collaborative project, she learnt how to carry out more flexible teaching strategies, promoting pupils’ autonomous without compromising the curriculum. With the development of the project, she brought to the classroom a more accurate perception of her role in the communication dynamics of a classroom, in particular her concern to listen carefully to each student. She became an enthusiastic of group work and got convinced that in this way her own communication with students became more natural and effective