Content-Based Instruction (CBI) is an educational approach that integrates language learning with subject matter content. Instead of focusing solely on language skills, CBI emphasizes teaching students through engaging topics, such as science, history, or literature. This method helps learners acquire language in a meaningful context, making it more relevant and applicable to real-life situations. In CBI, teachers design lessons that promote both language proficiency and content knowledge. Students actively participate in discussions, projects, and activities related to the subject matter, which enhances their understanding and retention. This approach is particularly effective in language education and is widely used in immersion programs and ESL (English as a Second Language) settings.