In this paper analysis of Grade 3 mathematics teaching in South Africa shows evidence of associations between teaching and learning outcomes in an adapted learning study. The intervention dealt with partitioning and part-part-whole relations, taking a structural approach within tasks and representations. Our analysis of this teaching emphasizes simultaneity of examples, and connections within and across examples and representations. This analysis indicated differences in enactment of a jointly planned lesson that related to different patterns of learning outcomes between the three classes. Episodes of teaching containing work with representations marked by connections and simultaneity closed gaps in learning outcomes seen in the pre-test.