In this episode, Dr. Rina Zazkis, Canada Research Chair in STEM Teaching and Learning, shares insights from her book Lesson Play in Mathematics Education: A Tool for Research and Professional Development, co-authored with Dr. Peter Liljedahl and Dr. Nathalie Sinclair. The book outlines how play-writing engages teachers in considering vital issues in instruction, with an aim of enhancing learning experiences of students. This conversation also helps listeners understand Dr. Zazkis’ research into undergraduate mathematics education, focusing on mathematical content-knowledge of preservice teachers and ways this knowledge is acquired and modified.