An English teacher defines the following learning objectives for a unit: students should be able to sustain an opinion orally, support it with relevant evidence, respond to a counterargument, and adjust their language to the audience. A diagnostic activity shows considerable differences among students in these abilities.

Which instructional and assessment design is aligned with the stated objectives?

An English teacher designs a unit entitled "Englishes and Identity." Students examine recordings and written texts produced by speakers from India, Nigeria, Singapore, Jamaica, Canada, and the United Kingdom. The teacher also discusses intelligibility, identity, audience, and the social meanings attached to linguistic choices.

Considering language, culture, and linguistic diversity, which pedagogical approach is appropriate?