The incorporation of computer resources into the classroom has given rise to the need for understanding how such technology can be used to achieve effective teaching practices. Collaborative learning aided by wirelessly connected mobile computers is a work mode that has generated benefits for student learning in small-group activities. It is therefore of interest to investigate whether these benefits are also present when working in large groups such as an entire class. This paper proposes a Mediation Model for Large Group Collaborative Teaching based on the interactions that occur between the components of a classroom technologically mediated using wirelessly connected mobile devices. A particular case of the model is presented, followed by an example of it in the form of a collaborative activity.03FONDEFnm@ing.puc.cl0FONDEF3706