Part 1: Plenary Activities.- Thirteenth International Congress on Mathematical Education: An Introduction, Gabriele Kaiser.- Uncovering the Special Mathematical Work of Teaching, Deborah Loewenberg Ball.- Mathematics, Education, and Culture: A contemporary moral imperative, Bill Barton.- Mathematics classroom studies – Multiple lenses and perspectives, Berinderjeet Kaur.- "What is Mathematics ?" - And why we should ask where one should experience or learn that, and how to teach it, Günter Ziegler, Andreas Loos.- International Comparative Studies in Mathematics: Lessons and Future Directions For Improving Students’ Learning, Jinfa Cai, Ida Mok, Vijay Reddy, Kaye Stacey.- Transitions in Mathematics Education, Ghislaine Gueudet, Marianna Bosch, Andrea A. diSessa, Oh Nam Kwon, Lieven Verschaffel.- Part 2: Awardees' lectures.- ICMI Awards Ceremony, Carolyn Kieran, Jeremy Kilpatrick.- Mathematics Discourse in Instruction (MDI): A discursive resource as boundary object across practices, JillAdler.- The challenging relationship between fundamental research and action in mathematics education, Michèle Artigue.- Elementary mathematicians from advanced standpoints - a cultural perspective on mathematics education, Alan Bishop.- Design and Development for Large-Scale Improvement, Hugh Burkhardt, Malcolm Swan.- Making Sense of Mathematics Achievement in East Asia: Does culture really matter? Frederick K.S. Leung.- Part 3: Reports of the Survey teams.- Digital Technology in Mathematics Education: Research over the last Decade, Johann Engelbrecht, Marcelo C. Borba, Petek Askar, George Gadanidis, Salvador Llinares, Mario Sánchez Aguilar.- Conceptualisation of the role of competencies, knowing and knowledge in mathematics education research, Mogens Niss, Regina Bruder, Núria Planas, Ross Turner Turner, Jhony Alexander Villa-Ochoa.- Assistance of students with mathematical learning difficulties – How can research support practice? – A summary, Petra Scherer, Kim Beswick, Lucie DeBlois, Lulu Healy, Elisabeth Moser Opitz.- Mathematics teachers working and learning through collaboration, Barbara Jaworski, Olive Chapman, Alison Clark-Wilson, Annalisa Cusi, Cristina Esteley, Merrilyn Goos, Masami Isoda, Marie Joubert, Ornella Robutti.- Geometry education, including the use of new technologies: a survey of recent research, Nathalie Sinclair, Maria Bartolini Bussi, Michael de Villiers, Keith Jones, Ulrich Kortenkamp, Allen Leung, Kay Owens.- Part 4: Reports from the Thematic afternoon.- European Didactic Traditions in Mathematics – Aspects and Examples from four Selected Cases, Werner Blum, Michèle Artigue, Maria Alessandra Mariotti, Rudolf Sträßer, Marja Van den Heuvel-Panhuizen.- German-speaking traditions in mathematics education research, Hans Niels Jahnke, Rolf Biehler, Angelika Bikner-Ahsbahs, Uwe Gellert, Gilbert Greefrath, Lisa Hefendehl-Hebeker, Götz Krummheuer, Timo Leuders, Marcus Nührenbörger, Andreas Obersteiner, Kristina Reiss, Bettina Rösken-Winter, Andreas Schulz, Andreas Vohns, Rudolf vom Hofe, Katrin Vorhölter.- What is and what might be the legacy of Felix Klein? Hans-Georg Weigand, William McCallum, Marta Menghini, Michael Neubrand, Gert Schubring, Renate Tobies.- part 5: National presentations.- Argentinean National presentation, Esther Galina, Mónica Villarreal.- Teachers’ Professional Development and Mathematics Education in Brazil, Victor Giraldo.- Mathematics Education in Ireland, Maurice OReilly, Thérèse Dooley, Elizabeth Oldham, Gerry Shiel.- National presentation of Japan, Toshiakira Fujii, Yoshinori Shimizu, Hanako Senuma, Toshikazu Ikeda.- National presentation of Lower Mekong sub-region countries, Fidel R. Nemenzo, Masami Isoda, Maitree Inprasitha, Sampan Thinwiangthong, Narumon Changsri, Nisakorn Boonsena, Chan Roth, Monkolsery Lin, Souksomphone Anothay, Phoutsakhone Channgakham, Nguyen Chi Thanh, VU NHU Thu Huong, Phuong Th?o Nguy?n.- Teaching and learning mathematics in Turkey, Huriye Arikan.- Part 6: Reports from the Topical Study Groups.- Topic study group no. 01 Early childhood mathematics education (up to age 7), Iliada Elia, Joanne Mulligan.- Topic study group no. 02 Mathematics education at tertiary level, Victor Giraldo, Chris Rasmussen.- Topic study group no. 03 Mathematics education in and for work, Diana Coben, Geoff Wake.- Topic study group no. 04 Activities for, and research on, mathematically gifted students, Florence Mihaela Singer, Linda Jensen Sheffield.- Topic study group no. 05 Classroom practice and research for students with mathematical learning difficulties, Lourdes Figueiras, Rose Griffiths.- Topic study group no. 06 Adult learning, Pradeep Kumar Misra, Jürgen Maaß.- Topic study group no. 07 Populariztion of Mathematics, Christian Mercat, Patrick Vennebush.- Topic study group no. 08 Teaching and learning of arithmetic and number systems (focus on primary education), Pi-Jen Lin, Terezinha Nunes.- Topic study group no. 09 Teaching and learning of measurement (focus on primaryeducation), Christine Chambris, Barbara Dougherty.- Topic study group no. 10 Teaching and learning of early algebra, Carolyn Kieran, JeongSuk Pang.- Topic study group no. 11 Teachig and Learning of Algebra, Rakhi Banerjee, Amy Ellis.- Topic study group no. 12 Teaching and learning of geometry (primary level), Sinan Olkun, Ewa Swoboda.- Topic study group no. 13 Teaching and learning of geometry – secondary level, Ui Hock Cheah, Patricio G. Herbst.- Topic study group no. 14 Teaching and learning of probability, Carmen Batanero, Egan J. Chernoff.- Topic study group no. 15 Teaching and learning of statistics, Dani Ben-Zvi, Gail Burrill.- Topic study group no. 16 Teaching and learning of calculus, David Bressoud, Victor Martinez-Luaces.- Topic study group no. 17 Teaching and learning of discrete mathematics, Eric W. Hart, Cecile O. Buffet.- Topic study group no. 18 Reasoning and proof in mathematics education, Guershon Harel, Andreas Stylianides.- Topic study group no. 19 Problem solving inmathematics education, Peter Liljedahl, Manuel Santos Trigo.- Topic study group no. 20 Visualization in the teaching and learning of mathematics, Michal Yerushalmy, Ferdinand Rivera.- Topic study group no. 21 Mathematical applications and modelling in the teaching and learning of mathematics, Jussara Araújo, Gloria Ann Stillman.- Topic study group no. 22 Interdisciplinary mathematics education, Susie Groves, Julian Williams.- Topic study group no. 23 Mathematical literacy, Hamsa Venkat, Iddo Gal.- Topic study group no. 24 History of the teaching and learning mathematics, Fulvia Furinghetti, Alexander Karp.- Topic study group no. 25 The role of history of mathematics in mathematics education, Constantinos Tzanakis, Xiaoqin Wang.- Topic study group no. 26 Research on Teaching and Classroom Practice, Yoshinori Shimizu, Mary Kay Stein.- Topic study group no. 27 Learning and cognition in mathematics, Gaye Williams, Wim Van Dooren.- Topic study group no. 28 Affect, beliefs and identity in mathematics education, Markku Hannula, Francesca Morselli.- Topic study group no. 29 Mathematics and creativity, Demetra Pitta-Pantazi, Dace Kuma.- Topic study group no. 30 Mathematical competitions, Maria Falk de Losada, Alexander Soifer.- Topic study group no. 31 Language and Communication in Mathematics education, Judit Moschkovich, David Wagner.- Topic study group no. 32 Mathematics education in a multilingual and multicultural environment, Richard Barwell, Anjum Halai.- Topic study group no. 33 Equity in Mathematics Education (including Gender), Joanne Rossi Becker, Bill Atweh.- Topic study group no. 34 Social and political dimensions of mathematics education, Murad Jurdak, Renuka Vithal.- Topic study group no.35 Role of ethnomathematics in mathematics education, Milton Rosa, Lawrence Shirley.- Topic study group no.36 Task design, analysis and learning environments programme summary, Jiansheng Bao, Jere Confrey.- Topic study group no. 37 Mathematics curriculum development, Anita Rampa