M. A. (“Ken”) Clements is Emeritus Professor in the Department of Mathematics at Illinois State University. After teaching in schools for 10 years, he taught in three Australian universities (Monash, Deakin, and Newcastle), and at Universiti Brunei Darussalam (1997–2004). He has served as a consultant in India, Malaysia, PNG, South Africa, Thailand, and Vietnam, and was editor for the first three Springer international handbooks on mathematics education (1996, 2003, 2013). He has written or edited over 30 books and has authored more than 200 peer-reviewed articles. In 1996 he co-authored, with Nerida Ellerton, a UNESCO book on mathematics education research and is honorary life member of both the Mathematics Education Research Group of Australasia (MERGA) and the Mathematical Association of Victoria (MAV). Berinderjeet Kaur is a Professor of Mathematics Education at the National Institute of Education (NIE), Nanyang Technological University (NTU), Singapore. She received her Ph.D. in Education, specializing in Mathematics Education, from Monash University in Australia. She is an associate editor of ZDM Mathematics Education, a tier 1 journal, and is the series editor of books themed Mathematics Education – An Asian Perspective. Her publications appear in both national and international journals, books and proceedings of meetings. She is involved in the pre-service and in-service education of mathematics teachers at NIE, and was awarded the Excellence in Teaching Commendation by NIE in 2005, 2006, 2018 and 2020. Thomas Lowrie is Centenary Professor (2014) and Director of the STEM Education Research Centre (SERC) at the University of Canberra, Australia. Tom has an established international research profile in the discipline area of mathematics and STEM education. His concentrated and sustained (over 20 years) body of work has focused on the extent to which primary-agedstudents use spatial reasoning and visual imagery to solve mathematics problems and the role and nature of graphics in mathematics assessment. More recently, his research has expanded to include students' use of digital tools and dynamic imagery years, he taught in three Australian universities (Monash, Deakin, and Newcastle), and at Universiti Brunei Darussalam (1997–2004). He has served as a consultant in India, Malaysia, PNG, South Africa, Thailand, and Vietnam, and was editor for the first three Springer international handbooks on mathematics education (1996, 2003, 2013). He has written or edited over 30 books and has authored more than 200 peer-reviewed articles. In 1996 he co-authored, with Nerida Ellerton, a UNESCO book on mathematics education research and is honorary life member of both the Mathematics Education Research Group of Australasia (MERGA) and the Mathematical Association of Victoria (MAV). Vilma Mesa is Professor of Education andMathematics at the University of Michigan, and Faculty Associate at the Center for the Study of Higher and Post-secondary Education at the University of Michigan, USA. She investigates the role that resources play in developing teaching expertise in undergraduate mathematics, specifically at community colleges and in inquiry-based learning classrooms. She has conducted several analyses of instruction and of textbooks and collaborated in evaluation projects on the impact of innovative mathematics teaching practices for students in science, technology, engineering, and mathematics. She was the 2022 recipient of the Association of Women in Mathematics’ Louise May Award for Contributions to Mathematics Education and in 2022 she also won the University of Michigan’s Outstanding Undergraduate Research Opportunity Mentor Award. She serves as associate editor for Educational Studies in Mathematics, and has published over 60 articles and book chapters in mathematics education. Outlets. Johan Prytz is Associate Professor in mathematics education at Uppsala University, Sweden. He is lecturer in didactics with a specialization in mathematics. His research is largely about the history of mathematics teaching. He also participates in a project on the role of language in mathematical and science practices at school and in a project on higher education and sustainable development. He has published almost 40 scholarly books and journal articles.