CLIL (Content and Language Integrated Learning) aims to create connections between learners' lives and content taught in school. Learners co-construct understanding through using language to learn. It recreates conditions of first language acquisition. A CLIL environment provides rich input, intake, and output opportunities through interdisciplinary lessons. While not all input becomes intake, it makes children's language potential work. CLIL fits within national curricula and enriches learning through cooperation among language and content teachers with common teaching strategies. Its core features include multiple focus, safe environments, authenticity, active learning, scaffolding, and cooperation driven by cognition and thinking.