Coming to understanding important sustainability issues, “… such as global warming, holesin the ozone layer and resource depletion, and of the need for hazardous waste disposal in ageologically responsible manner” (QBSSSS, 2000, p. 4) is also identified in the Earth Sciencesyllabus as one of eight key aims of the curriculum.At the time the Earth Science syllabus was written, curriculum and assessmentauthorities in each state and territory in Australia were responsible for devising and enactingits own senior school curricula; however, in late 2008, an independent statuatory authority,ACARA, was established. One of its key purposes was to develop a national curriculum acrossa range of subject areas from ‘Foundation’ (5 year-old students) to Year 12. The most recentphases of curriculum development have seen the release of a range of senior Australiancurricula, including Biology, Chemistry, Physics, and EES. Each state and territory educationauthority in Australia is responsible for ensuring that the senior secondary courses they offerintegrate the Australian Curriculum learning content and achievement standards (ACARA,n.d.b).Within the Australian EES Curriculum, Sustainability is explicitly positioned as oneof three ‘cross-curriculum priorities’ (the others being Aboriginal and Torres Strait Islanderhistories and cultures, and Asia and Australia’s engagement with Asia), which presentopportunities for teachers to select contexts for learning that incorporate relevant key concepts(ACARA, 2016). The cross-curriculum priorities can be developed or applied through thelearning content, and “add depth and richness” to student learning (ACARA, 2016, para. 2).