This document provides an overview of Content and Language Integrated Learning (CLIL), including its definition, history, principles, goals and benefits. CLIL is an approach where subjects are taught in a foreign language to support both content learning and language acquisition. The document discusses different types of CLIL programs and frameworks like the 4Cs. It also outlines strategies and resources for effective CLIL lesson planning, including choosing appropriate content and language objectives, activities, and outcomes.