Concept:The language used in different subjects (science, maths, social science) has its own specific vocabulary and style. This variation of language based on the context or subject is called a register. When a language teacher works with subject teachers to teach language through these subject-specific registers, it is known as register‑based language teaching.
Explanation:Step 1: In language learning, language changes according to the situation or topic. For example, the language of science differs from the language of literature. This is called a register.
Step 2: The question describes a language teacher collaborating with subject teachers to use the special language of science, maths, or social science to teach general language skills.
Step 3: This approach focuses on the "field of discourse" – the subject matter – and helps students learn language through the registers of different content subjects.
Step 4: Among the given options, only "Register based language teaching" (Option A) matches this idea. Option B (Language through content) and Option C (Content through language) are similar but not the exact technical term used here. Option D (Content across language) is not a standard term.
Answer:A. Register based language teaching