Teachers and trainers’ professional development continues to be a high priority on the EU policy agenda. In 2010, the Bruges communiqué (2010) invited Member States to invest in VET teachers and trainers by offering flexible training provision. The Riga conclusions (2015) have put renewed emphasis on the issue, calling for more systematic approaches and better cooperation and partnerships. There is a need of competences from VET providers on how to set up innovative Work-based learning methodologies to prepare students for their future occupation thus improving their employability when leaving the school. In particular, the staff of VET providers need to become more acquainted with organising WBL experiences in mobility, because they allow students to acquire key competences and professional competences at once, apart from contributing to their personal development. With this regard peer learning has showed to be a powerful method for exchanging knowledge and experience and possibly speed up the development process.Work based learning summer schools project brought together 7 partners, including 5 VET Providers (Hetel, Insignare, SPTS, EUGES, AOCDTF) and two mobility expert (Uniser and Efil) from 7 countries (Spain, Portugal, Slovenia, Germany, France, Italy, Belgium) that had a common shared concern: to improve work based learning and mobility of learners by upscaling the VET provider competences and internationalisation. The final aim of WBL summer schools was to exchange good practices among project partners, related to teacher training on work-based learning and internationalisation of VET schools with the purpose of develop a model of a European ‘summer school’ for the professional continuous development of teachers/educators operating in VET providers on these themes.The mixed composition of the partnership allowed to have multiple point of view and develop a comprehensive approach to student learning mobility projects that covered all the main aspects: writing, planning, managing, monitoring, organising, assessing and enhancing intercultural learning. The resulting methodology has been based on role games, experiential and peer learning working activities in order to put the teachers and practitioners in the student shoes and boost mutual understanding among participants.From November 2017 to October 2019 the project unfolded into the creation of an innovative teacher training methodology that was initially built on the partners best practices. The 5 days summer school training format was piloted for the first time in Bologna (June 2018) and afterwards it has been reworked based on the participants and trainers feedbacks. A second edition took place one year later in La Rochelle (July 2019). After the second piloting the final format of the WBL summer school has been delivered.Together with the training methodology partnership conceived the Mobiliteach brand with the aim to further develop teacher trainings based on the same content (learning mobility abroad) and methodology and reunite all of them under the brand in order to be easily identifiable as high quality teacher trainings.An ad hoc website has been created to maximise the impact and reach as many VET provider as possible. It contains all information about the project and training materials which are freely downloadables without any limitation. The website www.mobiliteach.net has been conceived also to bring together the complete Mobiliteach teacher training offer that organisations inside and outside of the partnership are developing.The project had a relevant impact on: - VET teachers and staff that increased their competences on writing, planning, managing and organising WBL experiences and gained intercultural learning competences.- VET providers that increased their level of internationalisation and the upscale their VET provision thanks to the competences and skills acquired by their staff - Mobility experts gained a deeper understating on the VET system of the participating countries- All organisation reached with dissemination that got interested or are already participating to new Mobiliteach projects.The project in the long run will contribute to increase the offer of high quality WBL experience abroad to VET students and therefore enhance young people employability. Upscale of VET teachers competences and their increased awareness on the importance of. work-based learning experiences will also indirectly support work-based learning validation of competences and its integration in the students curricula.