Nelson Mandela high school opened its doors in 2014. The welcoming students in numerous courses (vocational, technological, grammar schools, a department of preparatory courses for entrance to the “Grandes Ecoles”* are its main characteristics.Nelson Mandela high school would like to reinforce teachers’ and students’ language skills in order to develop its genuine identity of International high school.Among other things the goals are to develop the use of a foreign language in non-linguistic classes, to encourage the non-linguistic teachers’ initiatives to use several foreign languages in and out of the specifically linguistic sections, to develop the concept of “reversed pedagogy” during language lessons, to share ideas on teaching practices.The participants to these “mobilities” will be non-linguistic teachers, willing to prepare the DNL exam*, as well as language teachers who want to develop and renew their educational practices.These mobilities include all staff involved in the widening of the high school to an international level.8 participants will be divided in groups as follows:Group (flow) 1: 3Group (flow) 2: 5 Planned activities:The candidates’ registration to the DNL exam*.The organization of 2 groups (flows) and therefore, the establishment of 1- 7 days language training and 1- 14-days-language training sessions, with our partner SILC*.Feedback to the entire educational community of this experience after each training period in order to prepare the future mobilities. Pooling, exchanges and sharing of experiences and observed practices.Methods used:An international committee of selection will be organized and will meet at the end of the school year (June) to examine and rank the applications following the criteria defined below:- The stability of the staff commitments.- The conformity of the request with the school needs. (especially in terms of profiles diversity)- The applicant’s will to share this experience both inside and outside the school.Expected results:After the first report, the high school will favor the sharing of experience and will reinforce the interdisciplinary which already exists. The high school will also create tutoring and peer learning (FLSco program*). It will continue European partnership projects and develop new partnerships (AFEU, Maison des Etats-Unis). It will create a multi-language welcoming books for foreign learners and a display to present Nantes City, the “Pays de Loire Region” and the high school in itself. The pupils will have the opportunity to use the English language for various school subjects. It will show them how useful the English language has become and they will be more conscious of their teachers as a coherent team. They will also be able to highlight their experience acquired abroad thanks to their Europass Mobility book. They can show it to their future employer along with a Europass C.V and a Europass language passport.Long-term advantages:- Launch this project among various teaching teams and be included in the “high school Project”.- Create a dynamic within the school, offer the opportunity of internship abroad to selected students in order to develop their language skills.- Develop the concept of citizenship within the community by increasing contacts with European Union correspondents and enterprises.- Maintain our network and develop other projects via E-Twinning platforms.*Grandes Ecoles: Business and economical schools for future engineers*DNL: (discipline non-linguistique): teachers of various non-linguistic school subjects who pass this exam are allowed to teach their subject in a foreign language.*SILC: institution specialized in linguistic training in France and abroad.*FLSco program: French as the language of education for foreign students.