Research reports from the annual conference of the International Group for the Psychology of Mathematics Education include: "La construcion algorithmique: niveaux ou stades?" (Mesquita); "For Establishing the Generality of Conjectures" (Miyazaki); "Teachers' Attitudes Towards Mathematics and Mathematics Teaching: Perspectives across Two Countries" (Moreira); "World Problems--the Construction of Multiplicative Structures" (Morgado); "Reconstruction of Mathematics Education: Teachers' Perceptions of and Attitudes to Change" (Mousley); "The Falsifiability Criterion and Refutation by Mathematical Induction" (Movshovitz-Hadar); "Young Children's Division Strategies" (Murray; Olivier; Human); "'It Makes Sense if You Think about How the Graphs Work. But in Reality...'" (Nemirovsky; Rubin); "Two-Step Problems--Research Findings" (Nesher; Hershkovitz); "Early Conceptions of Division. A Phenomenographic Approach" (Neuman); "Can Epistemological Pluralism make Mathematics Education More Inclusive?" (Neville); "The Pupil as Teacher: Analysis of Peer Discussions, in Mathematics Classes, between 12-Year-old Pupils and the Effects of Their Learning" (Newman; Pirie); "Teacher Attitudes and Interactions in Computational Environments" (Noss; Hoyles); "Children's Understanding of Measurement" (Nunes; Light; Mason); "A 3-Dimension Conceptual Space of Transformations for the Study of Intuition of Infinity in Plane Geometry" (Nunez); "The Status of Children's Construction of Relationships" (O'Brien); "Intra-Individual Differences in Fractions Arithmetic" (Ohlsson; Bee);"Construction of Procedures for Solving Multiplicative Problems" (Orozco; Hormaza); "Transfer in Learning 3D Reference System: From Interaction "Pupils as Expert System Developers" (Osta); "Levels of Knowledge about Signed Numbers: Effects of Age and Ability" (Peled); "Representations du probleme de mathematiques chez des enfants de 7 a 10 ans" (Perrin-Glorian); "Teaching as Meta-Communication" (Pimm); "Folding Back: Dynamics in the Growth of Mathematical Understanding" (Pire; Kieren); "Enseigner les mathematiques en premiere annee secondaire apres l'evaluation nationale francaise" (Pluvinage; Rauscher; Dupuis); "Etude des modeles implicites mis en ouvre par les enfants lors de la resolution de problemes complexes mettant en jeu une reconstruction d'une transformation arithmetique" (Poirier; Bednarz); "Classroom Aspects which Influence Use of Visual Imagery in High School Mathematics" (Presmeg); "Computer Activities in Mathematical Problem Solving with 11-14 Years Old Students: the Conditional Structure Learning" (Reggiani); "Symbolising and Solving Algebra Word Problems: the Potential of a Spreadsheet Environment" (Rojano; Sutherland); "Damien: a Case Study of a Reorganization of His Number Sequence to Generate Fractional Schemes" (Saenz-Ludlow); "The Use of Language in the Context of School Mathematics" (Sakonidis; Bliss); "Emergent Goals in Everyday Practices: Studies in Children's Mathematics" (Saxe); "Teachers' and Students' Beliefs and Opinions about the Teaching and Learning of Mathematics in Grade 4 in British Columbia" (Schroeder); "Problem Solving and Thinking: Constructivist Research" (Schultz); "Assessment of Thoughts Processes with Mathematical Software" (Schwarz; Dreyfus); "Spontaneous Strategies for Visually Presented Linear Programming Problems" (Shama; Dreyfus); "Initial Development of Prospective Elementary Teachers' Conceptions of Mathematics Pedagogy" (Simon); "The Effects on Students' Problem Solving Behaviour of Long-term Teaching through a Problem Solving Approach" (Stacey); "The Relationship Between Mental Models in Mathematics and Science" (Stavy; Tirosh); "Pupils as Expert System Developers" (Stevenson; Noss); "Drawing--Computermodel--Figure Case Studies in Students' Use of Geometry-Software" (Strasser; Capponi); "Overcoming Overgeneralizations: the Case of Communitativity and Associativity" (Tirosh; Hadass; Movshovitz-Hadar); "First Steps in Generalization Processes in Algebra" (Ursini); "Translation Processes Solving Applied Linear Problems" (Van Streun); "Graphical Environment for the Construction of Function Concepts" (Wenzelburger); "The Potential for Mathematical Activity in Tiling: Constructing Abstract Units" (Wheatley; Reynolds); "The Equal Sign Goes Both Ways. How Mathematics Instruction Leads to the Development of a Common Misconception" (Wolters); "Learning in an Inquiry Mathematics Classroom" (Wood); "The Role of Peer Questioning During Class Discussion in Second Grade Mathematics" (Yackel); "The Effect of Graphic Representation: An Experiment Involving Algebraic Transformations" (Yerushalmy; Gafni); and "In What Ways Are Similar Figures Similar?" (Zaslavsky).