Textbooks are an important educational resource for students， teachers and schools， playing an important role in the development of mathematics curriculum and in improving the quality of mathematics teaching and learning． In recent years， there has been an increased international interest in textbook research and development． Understanding how textbooks and their development are integrated into the professional work of teachers， how they promote and influence curriculum reform and how they support student learning， have become important directions in the field of textbook research．
The inaugural International Conference on Mathematics Textbook Research and Development， now called ICMT－1， was initiated and held at the University of Southampton， UK， by a team lead by Professor Fan Lianghuo， Chair in Education and Director of the Centre for Research in Mathematics and Science Education and Professor Geoffrey Howson， former Secretary General of the International Commission on Mathematical Education and Chair in Mathematics Curriculum Studies at the University of Southampton． Since then， the ICMT conference has been widely regarded as the most important and comprehensive international conference in the field of mathematics textbook research， with focus on many important areas in mathematics textbook research， and the conference series has had a positive impact on the research and development of textbooks in other subject areas as well． Following the success of ICMT－1 in the UK， ICMT－2 was held in Brazil， and ICMT－4 in Germany． Now the Fourth International Conference on Mathematics Textbook Research and Development， or ICMT－4， hosted by Beijing Normal University， will be held on November 14， 2022．
In addition to the main conference venue at Beijing Normal University， the Asian Center for Mathematics Education of East China Normal University， Northeast Normal University， School of Mathematics and Statistics of Central China Normal University， Department of Education of Tianjin Normal University， Southwest University， and School of Teacher Education of Zhejiang Normal University will set up online venues， and a number of heavyweight guests will deliver speeches at the opening ceremony．
ICMT－4 is the first time that the International Conference on Mathematics Textbook Research and Development is held in Asia since its inception． Nearly 400 mathematics educators and teachers from Asia， Europe， South America， North America， and Oceania would gather to share their academic achievements and practical experiences in textbook research．
It is understood that the conference program will include five plenary speeches to be delivered by Professor JeongSuk Pang （Korea National University of Education， Korea）， Professor Janine Remillard （University of Pennsylvania， USA）， Professor Sebastian Rezat （Paderborn University， Germany）， Professor Gert Schubring （Federal University of Rio de Janeiro， Brazil）， and Professor Shi Ningzhong （Northeast Normal University， China）． In addition to the themes of mathematics textbook development， mathematics textbook content and language， mathematics textbook use and student achievement， historical studies of mathematics textbooks， comparative studies of mathematics textbooks， mathematics textbook policy， and other disciplines and mathematics textbooks， the conference will， for the first time， cover the issues about the relationship between curriculum reform and textbook development， meta－studies of mathematics textbook research， and the challenges that mathematics textbooks face and their roles in the context of the current covid－19 epidemic．
The 4th International Conference on Mathematics Textbook Research and Development will also provide an international platform for Chinese mathematics educators to present the evolution of the development of Chinese mathematics textbooks and the latest academic research results of mathematics textbooks to the world． For more information about the conference， one may visit the conference website： https://icmt4.org.cn/ or contact the conference secretariat at icmt4＠bnu.edu.cn．
