This document discusses the 4Cs framework for Content and Language Integrated Learning (CLIL) developed by Professor Do Coyle. The 4Cs are Content, Communication, Cognition, and Culture. Content refers to the subject matter being taught. Communication means using language authentically to develop skills. Cognition involves engaging students cognitively and challenging them. Culture means developing cultural awareness and understanding. The 4Cs provide a framework for planning CLIL lessons by selecting content, defining language needs, choosing cognitive skills, and incorporating cultural elements throughout.