CLIL (Content and Language Integrated Learning) is an educational approach that integrates language learning with other subjects. It has four main components: content, cognition, communication, and culture (the "4Cs"). Content refers to the subject matter being taught, such as science or history. Cognition involves developing thinking skills. Communication means interacting and sharing information. Culture promotes intercultural awareness. In a CLIL lesson, all language skills of listening, reading, speaking, and writing are practiced, with a focus on using language meaningfully to learn other subjects.