The improvement of teacher practice is supported by the class visit. This paper presents the integration of a sharing system of documents as a mediation system tool in the class visit. This sharing system enhances the interaction between the teacher and the pedagogical supervisor when they work on the main pedagogical documents of the class visit. We made an experiment with the service Google Drive with fifteen teachers and three pedagogical supervisors of the technical education. The results of this experiment have shown an improvement of the educational quality of the class visit and better communication between teacher and pedagogical supervisor. It appears from this study that the teacher becomes less stressed and he requests much more help of the pedagogical supervisor than usual.