• CLIL
• Content and Language Integrated Learning
• students' and teachers' perceptions
• Tuscan secondary schools

Content and Language Integrated Learning (CLIL) is a dual-focused methodology that integrates the learning of a non-linguistic subject and that of a foreign language in order to improve students' skills and promote cultural cohesion through language learning opportunities. This study focuses on the implementation of CLIL in Italy since its introduction in upper secondary schools in 2010, in particular by analyzing the situation in Tuscan secondary schools. To fulfill this aim, the survey involves Tuscan students' and teachers' perspectives on CLIL, which were collected through questionnaires, interviews, and participation in meetings, and which gives insights on the world of CLIL and its practices.