This document discusses the historical development of Content and Language Integrated Learning (CLIL) and how it compares to other language teaching approaches. It examines two definitions of CLIL, including the 4Cs model of content, cognition, communication, and culture. The document then analyzes how earlier approaches like Grammar Translation, Structuralism, Communicative Language Teaching, and Task-Based Language Teaching defined and related content, context, communication, and cognition. It considers how CLIL compares and contrasts with these approaches, particularly through its integration of language and subjects. The document raises questions about how the four components of the 4Cs model are defined and what CLIL means for learners' language and subject experiences.