You can add the Teaching English to Speakers of Other Languages (TESOL) Graduate Certificate with just one additional course: ECLD 610.
The Culturally & Linguistically Diverse Education Endorsement (K-12) is 24 credit hours.
The Education MAT: Culturally & Linguistically Diverse Education Emphasis (which includes the endorsement above) is 30 credit hours.
To see a typical list of courses per term, visit an example Current Program Students page.
Official UNC Graduate Catalog Listings: