“…This coincides with evidence that Australian learners' mathematics performance on the Trends in International Mathematics and Science Study (TIMSS), undertaken in Year 4 and Year 8 of school, is declining (Thomson, Wernert, O'Grady, & Rodrigues, 2017).The focus of this article is to illustrate how spatial thinking skills, as one element of mathematical thinking, were supported during play. The article presents short transcripts of video data gathered during a 6-week project that focused on a topic of great interest to children at the end of their final preschool year: transitioning to formal school education (Cohrssen, de Quadros-Wander, Page, & Klarin, 2017). In these short episodes, it is demonstrated how, through joining in with children's play, their teacher encouraged and facilitated back and forth conversations that modeled and encouraged directional and locational language.…”