Lucy Rycroft-Smith is a writer, researcher, speaker and designer in mathematics education, working at Cambridge Mathematics as a Framework Designer and writing Espressos (filtered maths education research for teachers). She is studying for her PhD at the University of Cambridge, considering the idea of knowledge brokering – how, what, when. where and why mathematics teachers may connect with research. She is the author of The Equal Classroom: Life-Changing Thinking About Gender (2019) and Flip the System UK: A Teachers’ Manifesto (2017). A new book, The Primary Teacher's Maths Journeybook : A Year of Professional Learning, has just been published (Cambridge University Press, 2022).