What is code-switching, and when is it appropriate in ESL instruction?

What is code-switching, and when is it appropriate in ESL instruction?

• A. Using only one language in all activities.
• B. Alternating between languages; appropriate for clarification, building confidence, or ensuring comprehension, especially when introducing new concepts, then gradually increasing target-language use.
• C. Replacing English with a single L1.
• D. Not allowed in classrooms.

Answer: (B)