Jill is an Associate Professor in mathematics education at Deakin University. Following on from over two decades teaching secondary Mathematics, she has now been involved in primary and secondary Mathematics teacher education for almost as long. She is interested in mathematical thinking including mathematical modelling and reasoning across all levels of schooling. She has a special interest in using multiple representations, digital technology, and classroom discourse to increase opportunities for deep understanding by all learners. She led a team preparing tasks and advice for the new content descriptions related to mathematical modelling in Victorian Curriculum v2.0: Mathematics.