In 2017, a new Humanities and Social Sciences (HASS) curriculum was introduced into all of Western Australia's classrooms. The aim of this study was to investigate how teachers transitioned to that new HASS curriculum. Using case study methodology, the experiences, opportunities and challenges faced by the early childhood (EC) staff in two Perth schools were investigated as they prepared for and implemented a new HASS Curriculum. The results suggested the need for strong leadership in times of change. The results also indicated that these small, independent schools needed good resources and professional development to help understand the changes. The research is significant because it starts a much-needed conversation about prioritising HASS in the early years of schooling as well as addressing the challenges faced by early childhood teachers as they transition to teaching new curriculum in a core learning area.