This document discusses Content-Based Instruction (CBI) and Content and Language Integrated Learning (CLIL), which are approaches to teaching language through content. CBI is used in North America while CLIL is more common in Europe. Both are based on principles of Communicative Language Teaching and aim to teach language more effectively by using it as a means to understand content rather than an end itself. The document outlines theories of language and learning underlying CBI and CLIL and discusses their design, syllabus, teaching activities, roles of learners and teachers, instructional materials, contemporary models, and procedures.