1) Content and language integrated learning (CLIL) involves using a foreign language as the means to teach non-language subjects, with the goal of developing both content knowledge and language skills simultaneously.
2) There are various models for implementing CLIL, including full immersion programs and partial integration within specific subjects. Successful programs require gradual implementation, selection of appropriate subjects, curriculum design, and teacher training.
3) Both content and language teachers must adapt their methodologies, with content teachers focusing on participation and language teachers supporting content mastery. Materials should be visual and interactive to engage students.