The project aims to use new technologies to design a new education pathway on sustainable development, through bilingual learning activities and languages discovery in a European context. Initiated by the teachers and coordinated by the CIRDOC - a public patrimonial institution with yearslong commitment toward digital exploitation and innovation - the project in which will takes part the local authority of the four régions involved will create a dialogue between teachers working in an original environnement - plurilingual classroom - focusing on new didactic methods and challenges in digital innovation. We will target our actions on bilingual teachers of the CYCLE 3 by giving them the opportunity to be trained on the following points : - Plurilinguism didactic-Teach in a non language subject-Intercomprehension-Share the practices with the european partners and create common working tools.Cycle 3 teachers will be directly implicated in theses activities during seminars but will be in charge of disseminating all theses actions to all the teachers in all the academic cycle in order to guarantee a better continuity. Regarding the pupils, the missions will be to open them to plurilinguism through exchanges with their european mates, develop knowledges linked to sustainable development , develop a civic-minded attitude and their knowledges regarding european territories. It is about a partner network of four areas: The Val d’Aran ( Spain), Languedoc-Roussillon ( France), Aosta Valley and Piedmont ( Italy). The italian and french partners ( Assessorate for Education and Culture in Aosta Valley) have been working together since 2009 on the issues of bi-plurilingual teaching activities and plurilinguism promotion ( Comenius Regio project : Tales in our tongues). The productions realised during the project ( pupils and teacher) will be disseminated through training actions by the teachers and direct restitution in the professionals networks of each participant. A website will be devoted to the project in order to put online all the activities linked to the project throughout the tools offered by the digital library Occitanica.eu like Campus modules ( current research) and Maleta ( didactic and edutainment modules) which will insure an international pooling of the training courses undertaken of the teaching material produced and the learner’s project. This project will hit a large panel of school establishments, teachers, pupils in this deliminated European zone. At the end of this one, teachers will be most likely to teach in this bi-plurilingual context thanks to the exchanges of good practicises and the development of new working common tools. This will tend to an educationnal proposal more diversified and the decompartmentalization of languages. For the students, it will be about developping their linguistic index just as a reflexive attitude in their way of learning and conceiving one another’s linguistic skills as plurial and scalable. An education of cultural differences and otherness will also put forward.