The first volume of this proceedings contains an introduction and the plenary, research forum, working group, and discussion group papers. Papers include: (1) "Resources as a Verb: Recontextualizing Resources in and for School Mathematics" (Jill Adler); (2) "Markets and Standards: The Politics of Education in a Conservative Age" (Michael Apple); (3) "Analyzing the Mathematical Learning of the Classroom Community: The Case of Statistical Data Analysis" (Paul Cobb); (4) "The Production of Artifacts as Goal for School Mathematics?" (Cyril Julie); (5) "A Moment in the Zoom of a Lens: Towards a Discursive Psychology of Mathematics Teaching and Learning" (Stephen Lerman); (6) "Diversity and Change in Mathematics Teacher Education" (Chris Breen); (7) "Pilot In-Service Mathematics Teacher Project" (Barbara Jaworski); (8) "Talking Math: Proposal for School Change" (Lena Licon Khisty); (9) "The CAPE Project--Constructing Activities for Peer-Education" (Konrad Krainer); (10) "Reflecting on Mathematics Learning In and Out-of-School from a Cultural Psychology Perspective" (Guida de Abreu); (11) "Reflections on Mathematics Learning and Teaching: Implications of Cultural Perspectives" (Philip C. Clarkson); (12) "A Semiotic Analysis of Students' Own Cultural Mathematics" (Norma Presmeg); (13) "Linking Students' Own Cultural Mathematics and Academic Mathematics" (Marta Civil); (14) "Developing Chains of Signifiers: A New Tool for Teachers?" (Kathryn C. Irwin); (15) "Learning through Problem Solving" (Hanlie Murray, Alwyn Olivier, and Piet Human); (16) "Learning through Problem Solving" (Anne Reynolds); (17) "Supporting Students' Construction of Increasingly Sophisticated Ways of Reasoning through Problem Solving" (Koeno Gravemejier, Kay McClain, and Michelle Stephan); (18) "Supporting Students' Reasoning through Problem Solving--Implications for Classroom Practice" (Susie Groves); (19) "Building the Meaning of Statistical Association through Data Analysis Activities" (Carmen Batanero, Juan D. Godino, and Antonio Estepa); (20) "Building the Meaning of Statistical Association through Data Analysis Activities" (Michael Glencross); (21) "Graphing as a Computer-Mediated Tool" (Janet Ainley, Elena Nardi, and Dave Pratt); (22) "Symbol-Use, Fusion, and Logical Necessity: On the Significance of Children's Graphing" (Ricardo Nemirovsky); (23) "Advanced Mathematical Thinking" (David Reid); (24) "Algebra: Epistemology, Cognition and New Technologies" (Jean-Philippe Drouhard, Alan Bell, and Sonia Ursini); (25) "Classroom Research" (Donald Cudmore and Lyn English); (26) "Cultural Aspects in the Learning of Mathematics" (Nomma Presmeg, Marta Civil, Judit Moschkovich, and Phil Clarkson); (27) "Geometry" (Maria Alessandra Mariotti and Ana Mesquita); (28) "Research on the Psychology of Mathematics Teacher Development" (Andrea Peter-Koop and Vania Santos-Wagner); (29) "Research in the Social Aspects of Mathematics Education" (Jo Boaler and Paola Valero); (30) "The Teaching and Learning of Stochastics" (John Truran, Kath Truran, and Carmen Batanero); (31) "Understanding of Multiplicative Concepts" (Tom Cooper and Tad Watanabe); (32) "Embodiment, Enactivism and Mathematics Education" (Rafael Nunes, Lawrie Edwards, Joao Filipe Matos, and Stephen Campbell); (33) "Learning and Teaching Number Theory" (Stephen Campbell and Rina Zazkis); (34) "Under-Represented Countries in PME: National Mathematics Education Research Communities and Priorities" (Paola Valero, Bernadette Denys, Renuka Vithal, and Pedro Gomez); (35) "Frameworks for Research on Open-ended Mathematical Tasks" (Peter Sullivan and Shukkan Susan Leung); and (36) "Exploring Different Ways of Working with Videotape in Research and Inservice Work" (Susan Pirie and Chris Breen). (ASK)