Nowadays, some schools across all Czech educational system try to integrate curricula subjects. That means that students use not only their acquired knowledge but also their skills across curricula. Thus, speaking of foreign language tuition, students use English medium to study subjects such as geography, history or mathematics that were originally taught in the native language, in this case in Czech. This type of learning is exploited in the so-called Content and Language Integrated Learning (CLIL), which involves teaching a curricular subject through the medium of a foreign language. The purpose of this paper is therefore to discuss CLIL, its benefits, constraints and tips for teaching.