This article describes and discusses a unit of work taught by Maria Iki, a Social Sciences teacher at James Cook High School in South Auckland. The unit was taught as part of the TLRI project Tuhia ki Te Ao--Write to the Natural World. The project is concerned to develop students' eco-literacy and to help them to inform their environmental identities. This article: (1) provides readers with an account of how the issue of sea-level rise in the Pacific Island of Kiribati can be understood through a model of 3D eco-literacy; (2) offers Maria's reflections on the challenges involved in teaching the unit; (3) discusses the 3D eco-literacy developed in the unit; and (4) ends with some comments about how Maria plans to develop the unit in the second iteration of the project.