This edited volume is written in memoriam of Professor Emeritus Ubiratan D'Ambrosio (1932 - 2021), who was a well-known Brazilian mathematics educator and historian of mathematics. This book explores the diverse facets of D'Ambrosio's work as well as his legacy and the later adaptation of his ideas around the globe. It starts with a preface written by his son, Alexandre D' Ambrosio, who shares his personal experiences growing up with this father and his love for discovery. The book is then divided into four sections:

• Past and Future: Ubi's Way of Seeing Education in the Present
• Roots of Ethnomathematics
• Ethnomathematics in Action
• Trends in Ethnomathematics It features diverse points of view and experiences that explore mathematics and culture from researchers in the Americas, Africa, Europe and South Asia. Chapters range from personal explorations of D'Ambrosio's impact to broader views of his research and work. This book forms part of the growing understanding of Ubiratan D'Ambrosio's life, research, and the legacy he has left for millions of researchers, students and teachers worldwide.

This book is appealing to anyone involved in mathematics education research as well as those interested in the history and future of mathematics education.

Autorentext

Marcelo C. Borba is a Professor of the Graduate Program in Mathematics Education and of the Mathematics Department of São Paulo State University (UNESP) at Rio Claro, Brazil, where he chairs the research group GPIMEM. Marcelo researches the use of digital technology in mathematics education, online distance education, modeling as a pedagogical approach, critical mathematics education and qualitative research methodology. He is an Associate Editor of ZDM, the International Journal of Mathematics Education. He has presented lectures as an international guest in 14 countries around the world. He has served in many scientific committees in Brazil and abroad. Marcelo has published several books, book chapters, and refereed papers in journals in Portuguese, Spanish and English. He is the editor of a collection of books in Brazil, which has been published over the last 12 years and includes 33 books to date. He is currently leading a project of CAPES-PrInt that promotes internationalization of research in Brazil, with researchers from Australia, Austria, Canada, England, South Africa, and U.S.A. He also wrote the first thesis on ethnomathematics with the help of Ubiratan D'Ambrosio.

Daniel Clark Orey, Ph.D. is Professor Emeritus of Mathematics and Multicultural Education at California State University, Sacramento. He has taught and lived in Oregon, Brazil, Guatemala, México, Nepal and the United States. He is a Fulbright Senior specialist with experiences at the Pontifícia Universidade Católica de Campinas in Brazil (1998) and at Kathmandu University in Nepal (2007). He is currently a professor of mathematics education in the Departamento de Educação Matemática and serves in the Academic Master's Program in Mathematics Education at the Universidade Federal de Ouro Preto, Brazil.