Multilingualism is at the very heart of European identity, since languages are a fundamental aspect of the cultural identity of every European. Language acquisition and language enhancement gets more and more important for an intercultural dialogue in our society and for increasing job chances of individuals. Multilingual language skills are important in a cosmopolitan society and, as children are especially receptive to learning languages at an early age, linguistic competences and a multilingual education should be implemented since primary school and earlier. The promotion of linguistic diversity in education and training has always received important consideration by the European Commission, for example communication in foreign languages is one of the eight Key competences for lifelong learning (2006). CLIL stands for Content and Language Integrated Learning. It refers to teaching subjects such as science, history and geography to students through a foreign language. This can be by the foreign language teacher using cross curricular content or by the subject teacher using English as the language of instruction. Both methods result in the simultaneous learning of content and of a foreign language. Over the past two decades an increasing body of research has demonstrated that CLIL can enhance multilingualism and provide opportunities for deepening learners’ knowledge and skills, however effective use of CLIL requires a specific methodology and specific training of teachers. The aim of this project is to support primary school teachers in filling this gap by providing them with a comprehensive training program. The project will carry out a Survey on the state of the art on using CLIL on primary schools including good practices and difficulties experienced by teachers and a census of existing web based Open and Educational Resources for CLIL to be used in primary schools. Based on these the project will develop Guidelines on development and use of CLIL in primary schools, a set of CLIL materials and lesson plans for teaching science, mathematics and geography in English in primary schools, a Guide and a E-course addressed to teachers on how to use CLIL methodology in primary schools. The consortium is made of organizations active in research and/or training of teachers (P1 IT, P4 IT, P5 PT, P6 RO, P7 PL) and schools (P2 IT, P3 IT, P8 PT, P9 RO, P10 PL). Thanks to the project, over 59.000 members of target groups will be informed about the project, and over 700 teachers and 2.000 students will be involved on it at different levels.