The Purisima School from Torrevieja, Alicante, is a semi-private school that belongs to a Carmelitas Misioneras Congregation. This centre has various levels of education: six classes of pre-school, twelve classes of primary education, eight classes of secondary school and four of high school with a total of nine hundred and twenty students. Being the unique semi-private school in Torrevieja, the students come from different places of our region. The predominant language in Torrevieja is Spanish, however as there are one hundred and forty different nationalities, English-speaking nationalities, French, Russian, Arabic, making up more than a quarter of our foreign population. Given the sociocultural environment that Torrevieja has, it is completely necessary the acquisition of real skills in foreign languages, especially English is required. The next course it will start an important trilingual education project in our centre (Spanish, Valenciano and English) and for this reason, our School needs that our professorship, who is teaching their subjects in English, do it using the CLIL (Content and Language Integrated Learning) methodology, so, performing a course in a foreign country with this methodology, it can be the headstone of our project. A professorship who comes with a base in these courses, will be able to advise the other teachers and help to get our linguistic project, improving our coexistence with the foreign community and may be the beginning of future exchanges projects with English-speaking centres. For this Project, five participants have been selected. Two primary teachers and three secondary ones. They all are graduates and their work experience ranges are from five to fifteen years long. Their English level of them all is high. These teachers will take a course of one or two weeks abroad where they will be learn how to use a methodology based on CLIL. Our goal is that these five teachers selected are who lead our trilingual project, being who begin to teach their courses in English language and sharing this methodology with our other teachers, being benefited within less than three years, about nine hundred and twenty students and fifty teachers.