<< Objectives >>The One Stop CLIL Europe project aims at high-quality CLIL education. It offers a whole school approach which supports school leaders, language and internal quality coordinators and teachers of CLIL, language teachers and other teachers as well as inititial teacher trainers. To reach this goal a harmonised set of texts and tools are developed with regard to e.g. curriculum realisation, didactics and pedagogy and quality assurance. CLIL support as it currently exists, lacks this holistic approach<< Implementation >>During the project we will communicate through our website and organise five multiplier events in total in Belgium, Estonia, the Netherlands and Spain to multiply, discuss and further optimise our texts and tools. The digital and online blended in-service training for school teams will already start in 2024 and be the basis for continued in-service One Stop CLIL Europe training to be offered for at least five years after the project ends. This will take place alternately in the partner countries<< Results >>A position paper, a classroom guide for school teams, a framework of quality assurance and guidelines and questionnaires for pupils, teachers and parents, in-service training for school teams and case studies. Developing and aligning these texts and instruments and offering them as a comprehensive digital and online package will definitely make it easier for schools looking to optimise the realisation of their curriculum in a foreign language, trying to achieve high-quality CLIL-education.