This systematic literature review aims firstly at highlighting lacks and suggestions and/or good practices in clil teacher training, analysing and crossing the results, obtained from academic repositories; then at contributing to reach an optimal level of training for clil teachers, highlighting good practices as suggestions to fill the lacks. The 39 documents, which describe studies and mostly practices from almost all the European countries, have been obtained by Scopus, Educational Resources Information Centre (eric), ScienceDirect and partially Google Scholar, through the descriptor «clil teacher training» and a post-reading selection of the articles. Their qualitative data provided an exhaustive picture of the comprehensiveness of results, required by the method of systematic reviews. clil results to be a complex approach, involving many aspects which need to be considered. It is primarily perceived to be as engaging for students as demanding for teachers, due to its being learner-centred, with a large use of icts and online tools, as its implementation through a new pedagogy and modern teaching strategies, such as flipped-classroom and task-based. This is the theoretical starting point of the different actions and policies set up in the countries to train teachers for clil. But the results of this review, which draw the characteristics to take into account to train future clil teachers, underline the need of pre-service teacher training at University, hitherto generally disregarded in favour of in-service preparation. Concerning this latter, from the stakeholders in particular it is suggested continued update in clil method and research; further collaboration with colleagues, especially telecollaboration, which can be the answer to the need of clil update and to share good practices in authentic online communities; last but not least, further pedagogical preparation and management of icts, because clil aims to change the traditional schooling.

Desde su nacimiento en 1994 hasta ahora, el modelo AICLE (Aprendizaje Integrado de Contenidos y Lenguas Extranjeras) ha sido conceptualizado e implementando de diferentes modos, según las políticas de los diferentes gobiernos, o de las escuela, o de las propias actitudes de los docentes interesados, lo que ha causado un margen de vaguedad en su definición. Esto es muy importante, ya que la adopción de CLIL por parte de la Unión Europea para apoyar el objetivo del multilingüismo se ha centrado en los resultados lingüísticos en varios niveles y, por lo tanto, en las investigaciones y encuestas llevadas a cabo; sin embargo, las pràcticas CLIL las implementan principalmente docentes de asignaturas no lingüísticas, que necesitan ver la efectividad de su perspectiva, no solo desde el lingüístico. Este documento revisa la literatura y encuentra la definición de CLIL como "entorno abierto de educación", definitivamente adecuado para los profesores de cualquier asignatura no lingüística para poder participar en su implementación. También se subraya, teniendo en cuenta las directivas europeas, cómo el CLIL, en particular si se enseña a través de herramientas ofrecidas por las nuevas tecnologías, tiende a facilitar el aprendizaje global de los estudiantes y su ciudadanía europea, así como a ser el primer paso para uno nuevo modelo de práctica escolar.

Content and Language Integrated Learning (CLIL) was born in the ‘90s, explicitly aimed at fostering the European multilingualism at school, by means of the embedding content and foreign/minority languages, whose implementation non-linguistic subject teachers have been the only main characters for a long time. As a matter of fact, by now CLIL does not seem to be as widespread as wished in the European schools, often because it is not seen as an opportunity for teachers, but as a demanding top-down policy, both in training them and in workload for them. So, it is not perceived primarily in its global importance for a new kind of schooling, in which multilingualism is part of the holistic knowledge required to students of the XXI century, not the only real aim of CLIL, as the almost exclusively interest in it of the Foreign Languages (FLs) and Applied Linguistics Departments could demonstrate.

It is here reported the experience of a first classroom of an Italian Liceo during the semi-lockdown at school (students in weekly rotation), then full. Creating a participatory environment was the aim, to give all students the opportunity to acquire concrete knowledge and to develop the 21st century skills, starting from the Learning ones. So, cooperative peers in flipped classroom, were invited to: read and see teacher’s selected sources (also for 3D visors); write an online document (Word), answering to questions of their peer; create a digital storytelling of the topic to orally expose online, collaborating through social media (WhatsApp) and collaborative online tools; finally, answer to a quiz (Quizziz). The obtained results concern: the engagement of the classroom, which fosters all students’ essential understanding and knowledge; inclusion of weaknesses, through their active role in cooperation; inclusion of mobile-phones as democratic tool; ubiquity of learning, which reduces the distance between online and in-presence schooling; above all, fostering the achievement of the 21st century skills, particularly learning-to-learn. For all these reasons, what lockdown teaches will remain as a valid didactical lesson.