In this video, Del Costello unpacks the 'Expanding Vocabulary' kete from the MOE resource Te Kōrerorero - Talking Together. In addition to the resource, she provides some great examples and models for the explicating teaching and learning of new vocabulary.

Here are some related links and readings:
What every primary teacher should know about vocabulary - Van Hees and Nation: https://www.nzcer.org.nz/nzcerpress/primary-vocabulary

Concept Development and Vocab: https://www.education.vic.gov.au/childhood/professionals/learning/ecliteracy/interactingwithothers/Pages/conceptsdevelopmentandvocabulary.aspx