CBLT focuses on what language learners can do with language skills rather than knowledge about language. It emerged in the 1970s in the US and defines educational goals by describing measurable knowledge, skills, and behaviors students should have. CBLT uses competencies for specific situations, covers areas needed, and focuses on outcomes. The teacher assesses students initially and groups them by proficiency level. Students progress through stages to complete courses and are grouped at Stage 3 based on learning goals and competencies. CBLT provides feedback and guides assessment quality.