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We are delighted to welcome you to the International Conference on Education and New Developments 2015-END 2015, taking place in Porto, Portugal, from 27 to 29 of June. Education, in our contemporary world, is a right since we are born. Every experience has a formative effect on the constitution of the human being, in the way one thinks, feels and acts. One of the most important contributions resides in what and how we learn through the improvement of educational processes, both in formal and informal settings. Our International Conference seeks to provide some answers and explore the processes, actions, challenges and outcomes of learning, teaching and human development. Our goal is to offer a worldwide connection between teachers, students, researchers and lecturers, from a wide range of academic fields, interested in exploring and giving their contribution in educational issues. We take pride in having been able to connect and bring together academics, scholars, practitioners and others interested in a field that is fertile in new perspectives, ideas and knowledge. We counted on an extensive variety of contributors and presenters, which can supplement our view of the human essence and behavior, showing the impact of their different personal, academic and cultural experiences. This is, certainly, one of the reasons we have many nationalities and cultures represented, inspiring multi-disciplinary collaborative links, fomenting intellectual encounter and development. END 2015 received 528 submissions, from 63 different countries, reviewed by a double-blind process. Submissions were prepared to take form as Oral Presentations, Posters, Virtual Presentations and Workshops. It was accepted for presentation in the conference, 176 submissions (33% acceptance rate). The conference also includes a keynote presentation from an internationally distinguished researcher, Professor Dr. Martin Braund, Adjunct Professor at Cape Peninsula University of Technology in Cape Town, South Africa and Honorary Fellow in the Department of Education at the University of York, UK, to whom we express our most gratitude. This volume is composed by the proceedings of the International Conference on Education and New Developments (END 2015), organized by the World Institute for Advanced Research and Science (W.I.A.R.S.) and had the help of our respected media partners that we reference in the dedicated page. This conference addressed different categories inside the Education area and papers are expected to fit broadly into one of the named themes and sub-themes. To develop the conference program we have chosen four main broad-ranging categories, which also cover different interest areas: (1) In TEACHERS AND STUDENTS: Teachers and Staff training and education; Educational quality and standards; Curriculum and Pedagogy; Vocational education and Counseling; Ubiquitous and lifelong learning; Training programs and professional guidance; Teaching and learning relationship; Student affairs (learning, experiences and diversity); Extra-curricular activities; Assessment and measurements in Education. (2) In PROJECTS AND TRENDS: Pedagogic innovations; Challenges and transformations in Education; Technology in teaching and learning; Distance Education and eLearning; Global and sustainable developments for Education; New learning and teaching models; Multicultural and (inter)cultural communications; Inclusive and Special Education; Rural and indigenous Education; Educational projects. (3) In TEACHING AND LEARNING: Educational foundations; Research and development methodologies; Early childhood and Primary Education; Secondary Education; Higher Education; Science and technology Education; Literacy, languages and Linguistics (TESL/TEFL); Health Education; Religious Education; Sports Education. (4) In ORGANIZATIONAL ISSUES: Educational policy and leadership; Human Resources development; Educational environment; Business, Administration, and Management in Education; Economics in Education; Institutional accreditations and rankings; International Education and Exchange programs; Equity, social justice and social change; Ethics and values; Organizational learning and change. The proceedings contain the results of the research and developments conducted by authors who focused on what they are passionate about: to promote growth in research methods intimately related to teaching, learning and applications in Education nowadays. It includes an extensive variety of contributors and presenters, who will extend our view in exploring and giving their contribution in educational issues, by sharing with us their different personal, academic and cultural experiences. (Individual papers contain references.)

The theme of the 38th meeting of the International Group for the Psychology of Mathematics Education (PME 38) and the 36th meeting of the North American Chapter of the Psychology of Mathematics Education (PME-NA 36) was "Mathematics Education at the Edge." Academically, the theme provides opportunities to highlight and examine mathematics education research that is: (1) breaking new ground or on the cutting edge of innovative research and research methodologies; and (2) exploring issues with groups that are often positioned at the edge or periphery of educational research, such as social justice, peace education, equity, and Indigenous education. Geographically, the theme "Mathematics Education at the Edge" describes the very place of the conference setting, Vancouver, a city situated at the edge of Canada on the Pacific Ocean and Coast Mountain Range. The papers in the six volumes of these proceedings are organized according to the type of presentation. Volume 1 contains the presentations of the plenary speakers, Research Forum activities, Discussion Group activities, Working Session activities and the National Presentation of mathematics education in Canada. Volumes 2-5 contain the Research Reports of the conference, while Volume 6 consists of the Short Oral and Poster Presentations. The organization of PME 2014 is a collaborative effort involving teams of colleagues at the University of British Columbia and Simon Fraser University.

The Third International Conference on Data Mining (EDM 2010) was held in Pittsburgh, PA, USA. It follows the second conference at the University of Cordoba, Spain, on July 1-3, 2009 and the first edition of the conference held in Montreal in 2008, and a series of workshops within the AAAI, AIED, EC-TEL, ICALT, ITS, and UM conferences. EDM 2011 will be held in Eindhoven, Netherlands. EDM brings together researchers from computer science, education, psychology, psychometrics, and statistics to analyze large data sets to answer educational research questions. The increase in instrumented educational software and databases of student test scores, has created large repositories of data reflecting how students learn. The EDM conference focuses on computational approaches for analyzing the data to address important educational questions. The broad collection of research disciplines ensures cross fertilization of ideas, with the central questions of educational research serving as a unifying focus. This publication presents the following papers: (1) Effort-based Tutoring: An Empirical Approach to Intelligent Tutoring (Ivon Arroyo, Hasmik Mehranian and Beverly P. Woolf); (2) An Analysis of the Differences in the Frequency of Students' Disengagement in Urban, Rural, and Suburban High Schools (Ryan S.J.d. Baker and Sujith M. Gowda); (3) On the Faithfulness of Simulated Student Performance Data (Michel C. Desmarais and Ildiko Pelczer); (4) Mining Bodily Patterns of Affective Experience during Learning (Sidney D'Mello and Art Graesser); (5) Can We Get Better Assessment From A Tutoring System Compared to Traditional Paper Testing? Can We Have Our Cake (Better Assessment) and Eat It too (Student Learning During the Test)? (Mingyu Feng and Neil Heffernan); (6) Using Neural Imaging and Cognitive Modeling to Infer Mental States while Using an Intelligent Tutoring System (Jon M. Fincham, John R. Anderson, Shawn Betts and Jennifer Ferris); (7) Using multiple Dirichlet distributions to improve parameter plausibility (Yue Gong, Joseph E. Beck and Neil T. Heffernan); (8) Examining Learner Control in a Structured Inquiry Cycle Using Process Mining (Larry Howard, Julie Johnson and Carin Neitzel); (9) Analysis of Productive Learning Behaviors in a Structured Inquiry Cycle Using Hidden Markov Models (Hogyeong Jeong, Gautam Biswas, Julie Johnson and Larry Howard); (10) Data Mining for Generating Hints in a Python Tutor (Anna Katrina Dominguez, Kalina Yacef and James R. Curran); (11) Off Topic Conversation in Expert Tutoring: Waste of Time or Learning Opportunity (Blair Lehman, Whitney Cade and Andrew Olney); (12) Sentiment Analysis in Student Experiences of Learning (Sunghwan Mac Kim and Rafael A. Calvo); (13) Online Curriculum Planning Behavior of Teachers (Keith E. Maull, Manuel Gerardo Saldivar and Tamara Sumner); (14) A Data Model to Ease Analysis and Mining of Educational Data (Andre Kruger, Agathe Merceron and Benjamin Wolf); (15) Identifying Students' Inquiry Planning Using Machine Learning (Orlando Montalvo, Ryan S.J.d. Baker, Michael A. Sao Pedro, Adam Nakama and Janice D. Gobert); (16) Skill Set Profile Clustering: The Empty K-Means Algorithm with Automatic Specification of Starting Cluster Centers (Rebecca Nugent, Nema Dean and Elizabeth Ayers); (17) Navigating the parameter space of Bayesian Knowledge Tracing models: Visualizations of the convergence of the Expectation Maximization algorithm (Zachary Pardos and Neil Heffernan); (18) Mining Rare Association Rules from e-Learning Data (Cristobal Romero, Jose Raul Romero, Jose Maria Luna and Sebastian Ventura); (19) Using Text Replay Tagging to Produce Detectors of Systematic Experimentation Behavior Patterns (Michael Sao Pedro, Ryan S.J.d. Baker, Orlando Montalvo, Adam Nakama and Janice D. Gobert); (20) Identifying High-Level Student Behavior Using Sequence-based Motif Discovery (David H. Shanabrook, David G. Cooper, Beverly Park Woolf and Ivon Arroyo); (21) Unsupervised Discovery of Student Strategies (Benjamin Shih, Kenneth R. Koedinger and Richard Scheines); (22) Assessing Reviewer's Performance Based on Mining Problem Localization in Peer-Review Data (Wenting Xiong, Diane Litman and Christian Schunn); (23) Using Numeric Optimization To Refine Semantic User Model Integration Of Adaptive Educational Systems (Michael Yudelson, Peter Brusilovsky, Antonija Mitrovic and Moffat Mathews); (24) An Annotations Approach to Peer Tutoring (John Champaign and Robin Cohen); (25) Using Educational Data Mining Methods to Study the Impact of Virtual Classroom in E-Learning (Mohammad Hassan Falakmasir and Jafar Habibi); (26) Mining Students' Interaction Data from a System that Support Learning by Reflection (Rajibussalim); (27) Process Mining to Support Students' Collaborative Writing (Vilaythong Southavilay, Kalina Yacef and Rafael A. Callvo); (28) Automatic Rating of User-Generated Math Solutions (Turadg Aleahmad, Vincent Aleven and Robert Kraut); (29) Tracking Students' Inquiry Paths through Student Transition Analysis (Matt Bachmann, Janice Gobert and Joseph Beck); (30) DISCUSS: Enabling Detailed Characterization of Tutorial Interactions Through Dialogue Annotation (Lee Becker, Wayne H. Ward and Sarel vanVuuren); (31) Data Mining of both Right and Wrong Answers from a Mathematics and a Science M/C Test given Collectively to 11,228 Students from India [1] in years 4, 6 and 8 (James Bernauer and Jay Powell); (32) Mining information from tutor data to improve pedagogical content knowledge (Suchismita Srinivas, Muntaquim Bagadia and Anupriya Gupta); (33) Clustering Student Learning Activity Data (Haiyun Bian); (34) Analyzing Learning Styles using Behavioral Indicators in Web based Learning Environments (Nabila Bousbia, Jean-Marc Labat, Amar Balla and Issam Rebai); (35) Using Topic Models to Bridge Coding Schemes of Differing Granularity (Whitney L. Cade and Andrew Olney); (36) A Distillation Approach to Refining Learning Objects (John Champaign and Robin Cohen); (37) A Preliminary Investigation of Hierarchical Hidden Markov Models for Tutorial Planning (Kristy Elizabeth Boyer, Robert Phillips, Eun Young Ha, Michael D. Wallis, Mladen A. Vouk, and James C. Lester); (38) Higher Contributions Correlate with Higher Learning Gains (Carol Forsyth, Heather Butler, Arthur C. Graesser, Diane Halpern); (39) Pinpointing Learning Moments; A finer grain P(J) model (Adam Goldstein, Ryan S.J.d. Baker and Neil T. Heffernan); (40) Predicting Task Completion from Rich but Scarce Data (Jose P. Gonzalez-Brenes and Jack Mostow); (41) Hierarchical Structures of Content Items in LMS (Sharon Hardof-Jaffe, Arnon Hershkovitz, Ronit Azran and Rafi Nachmias); (42) Is Students' Activity in LMS Persistent? (Arnon Hershkovitz and Rafi Nachmias); (43) EDM Visualization Tool: Watching Students Learn (Matthew M. Johnson and Tiffany Barnes); (44) Inferring the Differential Student Model in a Probabilistic Domain Using Abduction inference in Bayesian networks (Nabila Khodeir, Nayer Wanas, Nevin Darwish and Nadia Hegazy); (45) Using LiMS (the Learner Interaction Monitoring System) to Track Online Learner Engagement and Evaluate Course Design (Leah P. Macfadyen and Peter Sorenson); (46) Observing Online Curriculum Planning Behavior of Teachers (Keith E. Maull, Manuel Gerardo Saldivar and Tamara Sumner); (47) When Data Exploration and Data Mining meet while Analysing Usage Data of a Course (Andre Kruger, Agathe Merceron and Benjamin Wolf); (48) AutoJoin: Generalizing an Example into an EDM query (Jack Mostow and Bao Hong (Lucas) Tan); (49) Conceptualizing Procedural Knowledge Targeted at Students with Different Skill Levels (Martin Mozina, Matej Guid, Aleksander Sadikov, Vida Groznik, Jana Krivec, and Ivan Bratko); (50) Data Reduction Methods Applied to Understanding Complex Learning Hypotheses (Philip I. Pavlik Jr.); (51) Analysis of a causal modeling approach: a case study with an educational intervention (Dovan Rai and Joseph E. Beck); (52) Peer Production of Online Learning Resources: A Social Network Analysis (Beijie Xu and Mimi M. Recker); (53) Class Association Rules Mining from Students' Test Data (Cristobal Romero, Sebastian Ventura, Ekaterina Vasilyeva and Mykola Pechenizkiy); (54) Modeling Learning Trajectories with Epistemic Network Analysis: A Simulation-based Investigation of a Novel Analytic Method for Epistemic Games (Andre A. Rupp, Shauna J. Sweet and Younyoung Choi); (55) Multiple Test Forms Construction based on Bees Algorithm (Pokpong Songmuang and Maomi Ueno); (56) Can Order of Access to Learning Resources Predict Success? (Hema Soundranayagam and Kalina Yacef); (57) A Data Driven Approach to the Discovery of Better Cognitive Models (Kenneth R. Koedinger and John C. Stamper); (58) Using a Bayesian Knowledge Base for Hint Selection on Domain Specific Problems (John C. Stamper, Tiffany Barnes and Marvin Croy); (59) A Review of Student Churn in the Light of Theories on Business Relationships (Jaan Ubi and Innar Liiv); (60) Towards EDM Framework for Personalization of Information Services in RPM Systems (Ekaterina Vasilyeva, Mykola Pechenizkiy, Aleksandra Tesanovic, Evgeny Knutov, Sicco Verwer and Paul De Bra); (61) A Case Study: Data Mining Applied to Student Enrollment (Cesar Vialardi, Jorge Chue, Alfredo Barrientos, Daniel Victoria, Jhonny Estrella, Juan Pablo Peche and Alvaro Ortigosa); (62) Representing Student Performance with Partial Credit (Yutao Wang, Neil T. Heffernan and Joseph E. Beck); (63) Where in the World? Demographic Patterns in Access Data (Mimi M. Recker, Beijie Xu, Sherry Hsi, and Christine Garrard); and (64) Pundit: Intelligent Recommender of Courses (Ankit Ranka, Faisal Anwar, Hui Soo Chae). Individual papers contain tables, figures, footnotes and references

This volume of the 30th annual proceedings of the International Group for the Psychology of Mathematics Education conference presents: plenary panel papers; research forum papers; short oral communication papers; and poster presentation papers from the meeting. Information relating to discussion groups and working sessions is also provided. Plenary lecture papers include: (1) Mathematics, didactical engineering and observation (G. Brousseau); (2) A Semiotic View of the Role of Imagery and Inscriptions in Mathematics Teaching and Learning (N. Presmeg); (3) School Mathematics as a Developmental Activity (S. Stech); and (4) PME 1 to 30--Summing Up And Looking Ahead (P. Tsamir and D. Tirosh). Plenary panel papers include: (1) The Necessity of Collaborations between Mathematicians and Mathematics Educators (Z. Gooya); (2) Generic versus Subject Specific Pedagogy (S. Groves); (3) How Can Schools Put Mathematics in Their Centre? (K. Krainer); and (4) Mathematics in the Centre (T. Rojano). The first research forum (RF01) includes: (1) Seeing More and Differently (L. Brown and A. Coles); (2) Joint Reflection as a Way to Cooperation between Researchers and Teachers (A. Hospesova, J. Machackova, and M. Ticha); (3) Opening the Space of Possibilities (A. Lebethe, N. Eddy, and K. Bennie); (4) Diverse Roles, Shared Responsibility (J. Novotna and A. Pelantova); (5) Research with Teachers (L. Poirier); (6) Developing a Voice (G. Rosen); and (7) Learning about Mathematics and about Mathematics Learning through and in Collaboration (V. Zack and D. Reid). The second research forum (RF02) includes: Exemplification in Mathematics Education (L. Bills, T. Dreyfus, J. Mason, P. Tsamir, A. Watson, and O. Zaslavsky). The third research forum (RF03) includes: (1) Conceptual Change in Mathematics Learning (D. Tirosh and P. Tsamir); (2) Aspects of Students' Understanding of Rational Numbers (X. Vamvakoussi and S. Vosniadou); (3) Conceptual Change in the Number Concept (K. Merenluoto and E. Lehtinen); (4) The Linear Imperative (W. Van Dooren, D. De Bock, and L. Verschaffel); (5) Conceptual Change in Advanced Mathematical Thinking (I. Biza and T. Zachariades); (6) Students' Interpretation of the Use of Literal Symbols in Algebra (K. P. Christou and S. Vosniadou); (7) The Dilemma of Mathematical Intuition in Learning (L. B. Resnick); and (8) Designing for Conceptual Change (B. Greer). Short oral communications papers include: (1) The Mathematics Teachers' Conceptions about the Possible Uses of Learning Objects from RIVED-Brazil Project (C. A. A. P. Abar and L. S. de Assis); (2) On the Way to Understanding Integration (S. Abdul-Rahman); (3) The Impact of Graphic-Calculator Use on Bedouin Students' Learning Functions (M. Abu-Naja and M. Amit); (4) How to Put It All Together? (M. Alagic); (5) Reading Mathematics Textbook as a Storybook (S. E. Anku); (6) Naming and Referring to Quantities When Solving Word Problems in a Spreadsheet Environment (D. Arnau and L. Puig); (7) If It Divides by 4, It Must Divide by 8 (J. Back); (8) Universal and Existential Mathematical Statements (R. Barkai, T. Dreyfus, D. Tirosh, and P. Tsamir); (9) Situtations, Linear Functions and the "Real World" (G. Benke); (10) The Relationship between High School Mathematics and Career Choices among High Achieving Young Women (S. B. Berenson, J. J. Michael, and M. Vouk); (11) Students' Understanding of Ambiguity in Symbols (K. P. Blair); (12) Reform-Oriented Teaching Practices and the Influence of School Context (J. Bobis and J. Anderson); (13) Approaching Linear (In)Dependence with Example-Generation (M. Bogomolny); (14) Metaphors in Teacher's Discourse (J. Bolite Frant, V. Font, and J. Acevedo); (15) Designing Instructional Programs that Facilitate Increased Reflection (J. Bowers and S. Nickerson); (16) Conformism in Teaching Mathematics (A. Braverman, P. Samovol, and M. Applebaum); (17) Constructing Multiplication (J. Brocardo, L. Serrazina, and I. Rocha); (18) The Trigonometric Connection (S. A. Brown); (19) Student Beliefs and Attitudes from Poetry Writing in Statistics (M. Bulmer, B. Lea, and K. Rolka); (20) The Teaching of Proof in Textbooks (R. Cabassut); (21) Classroom: A Learning Context for Teachers (A. P. Canavarro); (22) An Investigation of Differences in Performance in Mathematics between Parallel Students and Normal Entry Students at the Polytechnic--University of Malawi (P. C. Chamdimba); (23) A Study on Eliciting the Formula for the Area of Triangle from Students' Structuring of Tile Arrays and Figure Reconstructions (J.-H. Chen and S.-K. S. Leung); (24) Decision Making at Uncertainty (E. Chernoff and R. Zazkis); (25) A Study on Implementating Inquiry-Based Teaching to Facilitate Secondary School Students' Learning in the Retaking Mathematics Course (E.-T. Chin, C.-Y. Chen, C.-Y. Liu, and C.-P. Lin); (26) Girls Excelled Boys in Learning Geometric Transformation Using Tessellations (S. Choi-Koh and H. Ko); (27) A National Survey of Young Children's Understanding of Basic Time Concepts (J. Chung and C.-C. Yang); (28) An Exploration of the Mathematical Literacy of Irish Student Primary School Teachers (D. Corcoran); (29) Mathematics Teachers' Knowledge and Practice (J. P. da Ponte and O. Chapman); (30) Psychological Aspects of Students Thinking at the Stage of Graphical Representation in the Process of Investigation of Functions (M. Dagan); (31) Formative Feedback and Mindful Teaching of Undergraduate Mathematics (G. E. Davis and M. A. McGowen); (32) Mathematics Education in the South and Western Pacific (A. J. Dawson); (33) Teacher Meditation of Technology-Supported Graphing Activity (R. Deaney, S. Hennessy, and K. Ruthven); (34) A Categorization of Difficulties Encountered by 13-to-15-Year-Olds while Selecting Inverse Algebraic Operation (A. Demby); (35) "It's Infinity" (T. Dooley); (36) What Is to Be Known? (J.-P. Drouhard); (37) "The Most Normal Path" (M. Droujkova, S. Berenson, G. Mojica, K. Slaten, and H. Wilson); (38) Exploratory Mathematics Talk in Friendship Groups (J.-A. Edwards); (39) Conceptual Basis of Proof (L. D. Edwards); (40) In-Service Education under Market Conditions (L. R. Ejersbo); (41) Statements of Problems and Students' Choices between Linear or Non-Linear Models (C. Esteley, M. Villarreal, and H. Alagia); (42) Equity and Quality Mathematics Education (G. Frempong); (43) Is Sensitivity for the Complexity of Mathematics Teaching Measurable? (T. Fritzlar); (44) By Using the Outcome-Based Approach to Strengthen Students' Learning Capabilities (A. T.-F. Fung and K.-M. Leung); (45) Patterns of Students' Interactions while Doing Geometric Proofs in Groups (F. L. Gallos); (46) Dialogue: A Tool for Creating Mathematical Proof (S. Gholamazad); (47) Beginning Teachers in Mathematical Inquiry (B. Graves and C. Suurtamm); (48) Learning Trajectory of Fraction in Elementary Education Mathematics (S. Hadi); (49) Elementary Education Students' Affect towards and Advancement in Mathematics (M. S. Hannula, R. Kaasila, E. Pehkonen, and A. Laine); (50) Pre-Service Mathematics Teachers (B. Hartter and J. Olson); (51) Effectiveness of Video-Case Based Elementary Mathematics Teacher Training (R. Huang and J. Bao); (52) Improving Students' Level of Geometrical Thinking through Teacher's Regulating Roles (M. Imprasitha); (53) What's the Connection between Ears and Dice (I. Jan and M. Amit); (54) Tactile Perception in 3D Geometry (D. Jirotkova and G. Littler); (55) High Achieving Students' Conceptions of Limits (K. Juter); (56) Reading Visual Representations of Data with Kindergarten Children (S. Kafoussi); (57) Students' Use of Gestures to Support Mathematical Understandings in Geometry (L. H. Kahn); (58) Mathematical Abilities for Developing Understanding of Formal Proof (E. Kapetanas and T. Zachariades); (59) An Analysis of Connections between Errors and Prior Knowledge in Decimal Calculation (J. Kim, J. Pang, and K. Song); (60) Insights into Primary Teachers' Interpretations of Students' Written Answers in Mathematics (A. Klothou and H. Sakonidis); (61) The Role of Proof (S. Kmetic); (62) A Comparison of Mathematically Gifted and Non-Gifted Students in Intuitively Based, Probabilistic Misconception (E. S. Ko, B. H. Choi, and E. H. Lee); (63) Exploring Teaching and Learning of Letters in Algebra (A. Kullberg and U. Runesson); (64) Teaching Mathematics to Indigenous Students and Pupils from Multicultural Backgrounds (E. K. Lam); (65) Limitations of a Partitive Fraction Scheme in Developing Multiplicative Reasoning about Fractions (H. S. Lee); (66) Teachers' Reflection and Self-Assessment through the Use of a Videotape of Their Own Mathematics Instruction (S. Lee and J. Pang); (67) A Case Study on the Introducing Methods of the Irrational Numbers Based on the Freudenthal's Mathematising Instruction (Y. R. Lee); (68) A Case Study of an Elementary School Teacher's Professional Development on Mathematics Teaching in Context (Y.-C. Leu, C.-H. Hsu, and W.-L. Huang); (69) "But after All, We'll Need This for School" (N. Leufer and S. Prediger); (70) Developing Primary Students' Cognitive Skills through Interactive Mathematics Lessons (K.-M. Leung); (71) A Study on the Effects of Multiple Representation Curriculum on Fraction Number Learning Schemes for Fourth Grade Children (S.-K. S. Leung and I.-J. Wang); (72) Teachers' Knowledge about Definitions (E. Levenson and T. Dreyfus); (73) Supporting Teachers on Maintaining High-Level Instructional Tasks in Classroom by Using Research-Based Cases (P.-J. Lin); (74) Towards an Anti-Essentialist View of Technology in Mathematics Education (B. Lins and C. H. de Jesus Costa); (75) Comparing Teaching of Common Mathematical Tasks in Different Countries (G. Littler and M. Tzekaki); (76) New Approach of Neurocognition in Mathematical Education Research and further Implications (C. Liu, F.-L. Lin, and C.-N. Dai); (77) Reasoning and Generalizing about Functional Relationship in a Grade 2 Classroom (S. London McNab); (78) The MathematicalPerformances in Solving the Norming Problem (H.-L. Ma); (79) The Education of Reasoning (E. Macmillan); (80) The Effect of Rephrasing Word Problems on the Achievements of Arab Students in Mathematics (A. Mahajne and M. Amit); (81) An Approach to Eary Algebra Using Technology as an Enhancement (C. A. Maher and G. Gjone); (82) Teachers' Beliefs and Competencies of Creative Mathematical Activities (B. Maj); (83) Manipulative Representation (N. Mark-Zigdon and D. Tirosh); (84) Language, Power and Mathematics Learning (M. Mathye and M. Setati); (85) Children Learning as Participation in Web-Based Communities of Practice (J. F. Matos and M. Santos); (86) Recognizing Mathematical Competences (J. F. Matos, M. Santos, and M. Mesquita); (87) Mathematics Teachers' Preparation Program (A. S. Md. Yunus, R. Hamzah, H. Ismail, S. K. S. Hussain, and M. R. Ismail); (88) Mathematics Register Acquisition (T. Meaney); (89) Development of Spatial Abilities (H. Meissner); (90) An Encounter between Queer Theory and Mathematics Education (H. Mendick); (91) Establishing a Mathematics Learning Community in the Study of Mathematics for Teaching (J. Mgombelo and C. Buteau); (92) Talking Mathematics in a Second Language (H. Miranda); (93) Objects in Motion (I. Miranda, L. Radford, and J. G. Hernandez); (94) Researching the Appearance of Mathematical Argumentation (C. Misailidou); (95) Teachers' Pedagogical Content Knowledge in the Teaching of Quadrilaterals (I. A. C. Mok and M. Y. H. Park); (96) Out-of-School Experts in Mathematics Classes (J. Monaghan); (97) A Sequel to Trends in International Mathematics and Science Study (TIMSS), 2003, in Botswana (S. M. Montsho); (98) The Pattern and Structure Mathematics Awareness Project (PASMAP) (J. Mulligan and M. Mitchelmore); (99) Primary Pupils' Mathematics Achievement (C. Opolot-Okurut); (100) Images of Functions Defined in Pieces (R. Ovodenko and P. Tsamir); (101) A Comparative Analysis of Elementary Mathematics Textbooks of Korea and Singapore (J. Pang and H. Hwang); (102) Substitutions on Algebraic Statements, Based on Associations in Natural Reasoning (M. Panizza); (103) Virtual Learning Environments and Primary Teachers' Professional Development (M. C. Penalva-Martinez and C. Rey-Mas); (104) Cypriot Preservice Primary School Teachers' Subject-Matter Knowledge of Mathematics (M. Petrou); (105) Phenomenological Mathematics Teaching (P. Portaankorva-Koivisto); (106) Using the Debate to Educate Future Teachers of Mathematics (J. Proulx); (107) Surprise on the Way from Change of Length to Change of Area (N. Prusak, N. Hada, and R. Hershkowitz); (108) Discovering of Regularity (by 11-Years-Old Children) (M. Pytlak); (109) Using Manipulatives to Teach Students in College Developmental Math Classes about Fractions (S. L. Reynolds and E. B. Uptegrove); (110) Sixth Graders' Ability to Generalize Patterns in Algebra (F. Rivera and J. Rossi Becker); (111) Variety of Representational Environments in Early Geometry (F. Roubicek); (112) From Research on Using Problems Related to Functional Equations as Multifunctional Tools for Revealing Subject Mater Knowledge of Functions in Future Mathematics Teachers (M. Sajka); (113) Expert and Novice Primary Teachers' Intervening in Students' Mathematical Activity (H. Sakonidis, M. Kaldrimidou, and M. Tzekaki); (114) Examining Teachers' Reflections about Mathematics Teaching, Learning, and Assessment (V. M. Santos-Wagner); (115) Analyzing Students' Thought Process in Revealing Correspondence between Formulas and Geometrical Objects (P. Satianov and M. Dagan); (116) "No Need to Explain, We Had the Same" (K. Schreiber); (117) Characteristics of Malaysian Students' Understanding about Functions (S. A. Sh. Abdullah); (118) Mathematical Induction via Conceptual Representation (A. Sharif-Rasslan); (119) Exploring the Meanings of Events in Mathematics Classroom from Learners' Perspective (Y. Shimizu); (120) A Study on the Law of Large Numbers Instruction through Computer Simulation (B.-M. Shin and K.-H. Lee); (121) Mathematics Learning Quality for Gifted Junior High School Students in Taiwan (H.-Y. Shy, C.-H. Liang, and W.-M. Liang); (122) A Preservice Teacher's Growth in Subject Matter Knowledge while Planning a Trigonometry Lesson (K. M. Slaten); (123) Comparing Numbers: Counting-Based and Unit-Based Approaches (H. Slovin); (124) Mathematically Gifted 6th Grade Korean Students' Proof Level for a Geometric Problem (S Song, Y. Chong, J. Yim, and H. Chang); (125) Probability Reasoning Level of Gifted Students in Mathematics (S. Song, K. Lee, G. Na, and D. Han); (126) Analysis of Mathematically Gifted 5th and 6th Grade Students' Process of Solving "Straight Line Peg Puzzle" (S. Song, J. Yim, Y. Chong, and J. Kim); (127) Standard Mathematics Discourses of Developmental Algebra Undergraduates (S. K. Staats); (128) Novice Students, Experienced Mathematicians, and Advanced Mathematical Thinking Processes (E. Stadler); (129) The "Soil" of Extended Problems: The Cultural Background of the Chinese Mathematics Teaching Practice (X. Sun and N.-Y. Wong); (130) Immersion in Mathematical Inquiry: The Experiences of Beginning Teachers (C. Suurtamm and B. Graves); (131) The Whole Idea (S. Tobias); (132) The Teaching Modes (R. A. Tomas Ferreira); (133) Didactic Decisions (J. Trgalova and I. Lima); (134) Evaluating a Large-Scale National Program for Incorporating Computational Technologies to Mathematics Classrooms (M. Trigueros and A. I. Sacristan); (135) Symmetry: Equality or a Dynamic Transformation? (K. Tselepidis and C. Markopoulos); (136) Teaching Children to Count (F. Turner); (137) Student Conceptions and Textbook Messages (B. Ubuz); (138) Students' Errors in Transforming Terms and Equations (A. Ulovec and A. Tollay); (139) Mathematics with Technology (S. Ursini, G. Sanchez, and D. Santos); (140) Francisca Uses Decimal Numbers (M. E. Valedmoros Alvarez and E. F. Ledesma Ruiz); (141) Development of Numerical Estimation in Grade 1 to 3 (M. van Galen and P. Reitsma); (142) Mathematics Education and Neurosciences (MENS) (F. van Nex and T. Gebuis); (143) Symbolizing and Modeling to Promote a Flexible Use of the Minus Sign in Algebraic Operations (J. Vlassis); (144) An Analysis of Preservice Teachers' Estimation Strategies within the Context of Whole Numbers, Fractions, Decimals, and Percents (T. N. Volkova); (145) What Does It Mean to Interpret Students' Talk and Actions? (T. Wallach and R. Even); (146) The Research of Co-Teaching Math between Experienced and Preservice Teachers in Elementary School (J.-H. Wang); (147) The Influence of Teaching on Transforming Math Thinking (T.-Y. Wang and F.-J. Hsieh); (148) Searching for Common Ground (J. Watson, L. Webb, L. King, and P. Webb); (149) Are Beliefs and Practices Congruent or Disjoint? (L. Webb and P. Webb); (150) Working Memory and Children's Mathematics (M. Witt and S. Pickering); (151) Mathematics Education Reform in the United States (T. Wood); (152) A Modeling Perspective on Problem Solving in Students' Mathematics Project (F.-M. Yen and C.-K. Chang); and (153) Development of a Questionnaire to Measure Teachers' Mathematics-Related Beliefs (S.-Y. Yu and C.-K. Chang). Poster presentations include: (1) A Comparative Analysis of Mathematics Achievement and Attitudes of Male and Female Students in Botswana Secondary Schools (A. A. Adeyinka); (2) Logical-Mathematical Learning for Student with Down's Syndrome (R. M. Aguilar, A. Bruno, C. S. Gonzalez, V. Munoz, A. Noda, and L. Moreno); (3) The Math Fair as a Bridge between Mathematics and Mathematics Education, the University and Elementary or Junior High School (M. Beisiegel); (4) One Teaching Episode from a Learner's, an Observer's and a Teacher's Point of View (H. Binterova and J. Novotna); (5) A Framework for Studying Curricular Effects on Students' Learning (J. Cai and J. C. Moyer); (6) Preservice Elementary Teachers' Conceptual Understanding of Word Problems (O. Chapman); (7) Mathematics Education and School Failure (P.Chaviaris and S. Kafoussi); (8) Enhancing the Seventh Graders' Learning on Equality Axiom and Linear Equation through Inquiry-Oriented Teaching and Integrated Mathematics and Science Curriculum (K.-J. Chen, S.-Y. Yu, E.-T. Chin, and H.-L. Tuan); (9) To Conjecture the Staff Development Model of Mathematical Teacher According to Spark's Theory (Y.-T. Chen and S. Leou); (10) Discovery of Implementing Teaching by Discussion in Mathematics Classrooms (J. Chung); (11) Modeling Teachers' Questions in High School Mathematics Classes (S. Dalton, G. Davis, and S. Hegedus); (12) My Assistant, a Didactic Tool of Mathematics for Primary School Teachers (N. de Bengoechea-Olguin); (13) A Model to Interpret Teacher's Practices in Technology-Based Environment (N. C. Dedeoglu); (14) The Gnomon (P. Delikanlis); (15) The Teacher's Proactive Role in the Context of Word Problem Solving by Young Beginners in Algebra (I. Demonty); (16) Students' Geometrical Thinking Development at Grade 8 in Shanghai (L. Ding and K. Jones); (17) An Interdisciplinary Perspective on Learning to Teach Mathematical Writing (H. M. Doerr, K. Chandler-Olcott, and J. O. Masingila); (18) Multiplication Models (D. Droujkov and M. Droujkova); (19) Quantitative Grids and Cyclic Patterns (D. Droujkov and M. Droujkova); (20) Learners' Influence in Computer Environments (M. Droujkova nd D. Droujkov); (21) Alleviating Obstructions to Learning (D. Easdown); (22) Knowledge and Interpretation of Teachers to the School Content of Proportionality (H. Enriquez Ramirez and E. Jimenez de la Rosa Barrios); (23) Mathematical Flexibility in the Domain of School Trigonometry (C. Fi); (24) "Moving Fluidly among Worlds" (S. Gerofsky); (25) Making Practice Studyable (H. Ghousseini and L. Sleep); (26) Cognitive Roots for the Concept of Asymptote (V. Giraldo, M. Chaves, and E. Belfort); (27) Flemish and Spanish High School Students' Mathematics-Related Beliefs Systems (I. M. Gomez-Chacon, P. Op't Eynde, and E. De Corte); (28) Cube Nets (M.Hejny and D. Jirotkova); (29) From Word Notation of Relations between Constants and Unknown to Algebraic Notation (Pretest) (J. Herman); (30) Mathematics and Community Capacity Building (P. Howard and B. Perry); (31) A Study on the Mathematical Thinking in Learning Process (C.J.-Hsieh and F.-J. Hsieh); (32) A Case Study on Pre-Service Teachers Making Mathematical Model of Voronoi-Diagram (C.-T. Hu and T.-Y. Tso); (33) A Fast-Track Approach to Algebra for Adults (R. Hubbard); (34) The Validity of On-Screen Assessment of Mathematics (S. Hughes); (35) After Using Computer Algebra System, Change of Students' Rationales and Writing (I. K. Kim); (36) Using a Socrates' Method in a Course of Mathematics Education for Future Mathematics Teachers (N. H. Kim); (37) Beyond Visual Level (G. Kospentaris and T. Spirou); (38) Videopapers and Professional Development (T. Lima Costa and H. Nascentes Coelho); (39) Concurrent Calibration Design for Mathematics Learning Progress Investigation (C.-J. Lin, P.-H. Hung, and S. Lin); (40) Further Insights into the Proportion Reasoning and the Ratio Concept (C. Liu, F.-L. Lin, W. Kuo, and I.-L. Hou); (41) Coursework Patterns between Mathematics and Science among Secondary Students (X. Ma); (42) Beginning the Lesson (C. Mesiti and D. Clarke); (43) Development of Web Environment for Lower Secondary School Mathematics Teachers with 3D Dynamic Geometry Software (M. Miyazaki, H. Arai, K. Chino, F. Ogihara, Y. Oguchi, and T. Morozumi); (44) The Effect of the Teacher's Mode of Instruction inside Math Classrooms with a Computer (S. Mochon and M. E. F. Olvera); (45) Mathematics Education in Rural Schools (J. Mousley and G. Marks); (46) Mathematically Gifted Students' Conception of Infinity (G. Na and E. Lee); (47) A Good Moment in Time to Stop "Shying Away from the Nature of Our Subject"? (E. Nardi); (48) Toward Real Change through Virtual Communities (K. T. Nolan); (49) Powerful Ideas, Learning Stories and Early Childhood Mathematics (B. Perry, E.Harley, and S. Dockett); (50) Tracing the Development of Knowledge about Mathematics Teaching (C. Rey-Mas and C. Penalva-Martinez); (51) Preschool Children's Number Sense (L. de C. Ribeiro and A. G. Spinillo); (52) A First Approach to Students' Learning of Mathematical Contents (G. Sanchez-Matamoros and I. Escudero); (53) Young Children's Mathematics Education within a Philosophical Community of Inquiry (A. Sawyer); (54) Learning Mathematics in Austria (H. Schwetz and G. Benke); (55) The Influence of a Mathematician on His Students' Perceptions (A. Sharif-Rasslan); (56) Analysis on the Algebraic Generalization of Some Korean Mathematically Promising Elementary Students (S. Song, J. Yim, Y. Chong, and E. Park); (57) Students' Linguistic Strategies for Shared Authority in Undergraduate Algebra Discussions (S. Staats); (58) Contrasting Decimal Conceptions of Adult and School Students (K. Stacey and V. Steinle); (59) Mathematical Writing and the Development of Understanding (N. Stehlikova); (60) Enhancing Teachers' Professional Development through Developing Teaching Norms Based on Developing Classroom Learning Norms (W.-H. Tsai); (61) The Features in the Process of Mathematical Modeling with Dynamic Geometric Software (T.-Y. Tso); (62) Finding Instructive Characteristics of Picture Books that Support the Learning of Mathematics (S. van den Boogaard and M. van den Heuvel-Panhuizen); (63) High School Course Pathways of High Achieving Girls (P. H. Wilson, G. F. Mojica, K. M. Slaten, and S. B. Berenson); (64) The Developmental Stages of Representations of Simple Regular Space Figures of Elementary School Students (D.-B. Wu, J.-L. Ma, and D.-C. Chen); (65) How to Assess Mathematical Thinking? (S. Yesildere and E. B. Turnuklu); and (66) Lasting Effects of a Professional Development Initiative (S. Zehetmeier). (Individual papers contain references.)

The first volume of the 29th annual conference of the International Group for the Psychology of Mathematics Education contains plenary lecture and research forum papers as listed below. Short oral communications papers, poster presentations, brief summaries of discussion groups, and working sessions are also included in the volume. The plenary lectures include: (1) Modelling Students' Learning in Argumentation and Mathematics Proof (Fou-Lai Lin); (2) Travelling the Road to Expertise (Stacey); (3) Telling Identities (Sfar and Prusak); and (4) Co-Constructing Artefacts and Knowledge in Net-Based Teams (Reimann). The plenary panel section includes: (1) What Do Studies Like PISA Mean to the Mathematics Education Community? (Jones); (2) From a Profile to the Scrutiny of Student Performance (Yoshinori); (3) The PISA-Study (Neubrand); (4) Some Results from the PISA 2003 International Assessment of Mathematics Learning (Kieran); and (5) The Foundation and Spectacle of [the Leaning Tower of] PISA (Williams). The first research forum (RF01) includes: (1) Not Everything Is Proportional (De Brock, Van Dooren, and Verschaffel); (2) Designing Instruction on Proportional Reasoning with Average Speed (Gravemeijer, van Galen, and Keijzer); (3) Folding Perimeters (Friedlander and Arcavi); and (4) The Dolls' House Classroom (Ainley and Pratt). The second research forum (RF02) includes: (1) Shaping a Multi-Dimensional Analysis of Signs (Arzarello, Ferrara, Robutti, Paola, and Sabena); (2) Working with Artefacts (Bussi and Maschietto); (3) The Role of Gestures in Mathematical Discourse (Edwards); (4) Connecting Talk, Gesture, and Eye Motion for the Microanalysis of Mathematics Learning (Ferrara and Nemirovsky); (5) Why Do Gestures Matter? Gestures as Semiotic Means of Objectification (Radford); (6) Gestures, Signs and Mathematisation (Williams); and (7) Building Intellectual Infrastructure to Expose and Understand Ever-Increasing Complexity (Kaput). The third research forum (RF03) includes: (1) Using Growth Points to Describe Pathways for Young Children's Number Learning (Gervasoni); (2) Number Attainment in Sri Lankan Primary Schools (Hart); and (3) Mathematics Recovery (Pearn). The fourth research forum (RF04) includes: (1) The Place of Theory in Mathematics Education Research (Lester, Jr.); (2) Theories of Mathematics Education (Lerman); (3) The Articulation of Symbol and Mediation in Mathematics Education (Armella); (4) Using Theory to Advance Our Understandings of Student Cognitive Development (Pegg and Tall); (5) Trends in the Evolution of Models and Modeling Perspectives on Mathematical Learning and Problem Solving (Lesh and English); and (6) Issues and Tendencies in German Mathematics-Didactics (Torner and Sriraman). (Individual papers contain references.)

Though there has been limited empirical research on the cost component from the expectancy-value model, a recent interest in the construct has spurred advances in theory and measurement. We present a longitudinal analysis of four types of cost: effort, loss of valued alternatives, emotional, and outside cost. We focus on how cost changes over time in a critical short-term setting: gatekeeper courses. These courses are introductory university courses with high drop, withdrawal, and fail rates. We present data from calculus and statistics. In both samples we found that cost was strongly, negatively related to expectancy, and moderately, negatively related to value. Cost was also a significant predictor of course performance, with emotional cost having the largest effect.