The international learning community produced this example lesson plan to teach sustainability through the disciplinary lens of science and from the perspective of stewardship (RE/worldviews). It explores the Big question of How 'green' are electric cars? initially through a science lens before considering stewardship of the planet: the moral, values and beliefs driven perspectives which may stem from religious or worldviews. Expanding to a multidisciplinary conversation, this question will also value responses from other disciplines, e.g. geography or economics.