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These proceedings contain the papers of the International Conference e-Learning 2013, which was organised by the International Association for Development of the Information Society and is part of the Multi Conference on Computer Science and Information Systems (Prague, Czech Republic, July 23-26, 2013). The e-Learning 2013 conference aims to address the main issues of concern within e-Learning. This conference covers both technical as well as the non-technical aspects of e-Learning. The conference accepts submissions in the following seven main areas: Organisational Strategy and Management Issues; Technological Issues; e-Learning Curriculum Development Issues; Instructional Design Issues; e-Learning Delivery Issues; e-Learning Research Methods and Approaches; e-Skills and Information Literacy for Learning. Keynote papers in these proceedings include: (1) Thoughts on the Quality of Learning in MOOCs (Thomas C. Reeves); and (2) Social Networks as the support of the e-Learning (Jan Lojda). Full papers in these proceedings include: (1) Evaluation of Visual Computer Simulator for Computer Architecture Education (Yoshiro Imai, Masatoshi Imai and Yoshio Moritoh); (2) Understanding Children's Museum Learning from Multimedia Instruction (Asmidah Alwi and Elspeth McKay ); (3) How Does the "Digital Generation" Get Help on Their Mathematics Homework? (Carla van de Sande, May Boggess and Catherine Hart-Weber); (4) Productization and Commercialization of IT-Enabled Higher Education in Computer Science: A Systematic Literature Review (Irja Kankaanpää and Hannakaisa Isomäki); (5) Motivating an Action Design Research Approach to Implementing Online Training in an Organizational Context (Christine Rogerson and Elsje Scott ); (6) Social e-Learning in Topolor: A Case Study (Lei Shi, Dana Al Qudah and Alexandra I. Cristea); (7) Training Educators: Plan for Replicating the Experience (Ulanbek Mambetakunov and Marina Ribaudo); (8) Choosing Learning Methods Suitable for Teaching and Learning in Computer Science (Estelle Taylor, Marnus Breed, Ilette Hauman and Armando Homann); (9) Teaching AI Search Algorithms in a Web-Based Educational System (Foteini Grivokostopoulou and Ioannis Hatzilygeroudis ); (10) Digital Histories for the Digital Age: Collaborative Writing in Large Lecture Courses (Leen-Kiat Soh, Nobel Khandaker and William G. Thomas); (11) Promoting Scientific Literacy through the Online Argumentation System (Chun-Yen Tsai); (12) Using a Techno-Skepticism Framework to Evaluate the Perception and Acceptance of a New Online Reading List (Ajmal Sultany and Samantha Halford); (13) SMS-Based Learning in Tertiary Education: Achievement and Attitudinal Outcomes (Yaacov J Katz); (14) e-Portfolios @ Teacher Training: An Evaluation of Technological and Motivational Factors (Alfred Klampfer and Thomas Köhler ); (15) Effects of Facebook Tutoring on Learning English as a Second Language (Chang-hwa Wang and Cheng-ping Chen); (16) An Italian Experience of Social Learning at High School (Michelle Pieri, Davide Diamantini and Germano Paini); (17) Distance Education: Educational Trajectory Control (Andrey Isaev, Alla Kravets, Ludmila Isaeva and Sergey Fomenkov); (18) Leadership for Sustaining Pedagogical Innovations in ICT Implementation: A Case Study of Taiwanese Vocational High School (Yih-Shyuan Chen, Yu-Horng Chen, Shun-Jyh Wu and Fang-Kai Tang); (19) Towards to a Versatile Tele-Education Platform for Computer Science Educators Based on the Greek School Network (Michael Paraskevas, Thomas Zarouchas, Panagiotis Angelopoulos and Isidoros Perikos); (20) Adaptive Feedback Improving Learningful Conversations at Workplace (Matteo Gaeta, Giuseppina Rita Mangione, Sergio Miranda and Francesco Orciuoli); (21) Teachers Little Helper: Multi-Math-Coach (Martin Ebner, Martin Schön, Behnam Taraghi and Michael Steyrer); (22) Youflow Microblog: Encouraging Discussions for Learning (Rafael Krejci and Sean W. M. Siqueira); (23) Interaction Problems Accessing e-Learning Environments in Multi-Touch Mobile Devices: A Case Study in Teleduc (André Constantino da Silva, Fernanda Maria Pereira Freire, Alan Victor Pereira de Arruda and Heloísa Vieira da Rocha); (24) Integrating a Learning Management System with a Student Assignments Digital Repository. A Case Study (Javier Díaz, Alejandra Schiavoni, María Alejandra Osorio, Ana Paola Amadeo and María Emilia Charnelli); (25) On the Recommender System for University Library (Shunkai Fu, Yao Zhang and Seinminn); (26) Developing and Implementing a New Online Bachelor Program: Formal Adoption of Videoconferencing and Social Networking as a Step towards M-Learning (Roland van Oostveen and François Desjardins); (27) Developing a User Oriented Design Methodology for Learning Activities Using Boundary Objects (?lga Fragou and Achilles Kameas); (28) User Acceptance of a Haptic Interface for Learning Anatomy (Soonja Yeom, Derek Choi-Lundberg, Andrew Fluck and Arthur Sale); (29) e-Learning Software for Improving Students Music Performance Using Comparisons (M. Delgado, W. Fajardo and M. Molina-Solana); (30) A Digital Game for International Students Adjustments (Maryam Bisadi, Alton Y.K Chua and Lee Chu Keong); (31) Developing an ICT-Literacy Task-Based Assessment Instrument: The Findings on the Final Testing Phase (Jessnor Elmy Mat-jizat); (32) Peer Tutoring in the CIS Sandbox: Does it Work? (Mark Frydenberg); (33) e-Competent Teacher and Principal as the Foundation of e-Competent School e-Education, the Largest School Informatization Project in Slovenia 2008-2013 (Magdalena Šverc, Andrej Flogie, Maja Vicic Krabonja and Kristjan Percic); (34) Collaborative Tools in Upper Secondary School--Why? (Helle Mathiasen, Hans-Peter Degn, Christian Dalsgaard, Christian W Bech and Claus Gregersen); (35) Adaptation of Educational Text to an Open Interactive Learning System: A Case Study for RETUDIS (M. Samarakou, E.D. Fylladitakis, G. Tsaganou, J. Gelegenis, D. Karolidis, P. Prentakis and A. Papadakis); and (36) Using Podcasts in Distance Education (Herman Koppelman). Short papers in these proceedings include: (1) Big Data & Learning Analytics: A Potential Way to Optimize eLearning Technological Tools (Olga Arranz García and Vidal Alonso Secades); (2) Critical Factors in Mobile eLearning: A Quasi-Systematic Review (Sergio Assis Rodrigues, Rodrigo Pereira dos Santos, Lucas Arnaud and Jano Moreira de Souza); (3) Analysis of Instruction Models in Smart Education (JaeHyeong Park, JeongWon Choi and YoungJun Lee); (4) The History Harvest: An Experiment in Democratizing the Past through Experiential Learning (William G. Thomas and Patrick D. Jones); (5) Challenges of Mongolian e-Learning and An Improvement Method of Implementation (S.Baigaltugs, B. Munkhchimeg and J.Alimaa); (6) Towards a Trust Model in e-Learning: Antecedents of a Student's Trust (Woraluck Wongse-ek, Gary B Wills and Lester Gilbert); (7) Elemental Learning as a Framework for e-Learning (John V. Dempsey and Brenda C. Litchfield); (8) An Interactive Training Game Using 3D Sound for Visually Impaired People (Hsiao Ping Lee, Yen-Hsuan Huang and Tzu-Fang Sheu); (9) e-Learning Practice-Oriented Training in Physics: The Competence Information (Alla G. Kravets, Oxana V. Titova and Olga A. Shabalina); (10) Student Experiences on Interaction in an Online Learning Environment as Part of a Blended Learning Implementation: What is Essential? (Laura Salmi); (11) Usability Assessment of e-Cafe Operational Management Simulation Game (Chiung-sui Chang and Ya-Ping Huang); (12) System for Automatic Generation of Examination Papers in Discrete Mathematics (Mikael Fridenfalk); (13) Direction of Contents Development for Smart Education (YoungSun Park, SangJin An and YoungJun Lee); (14) Online Training in Australia (Joze Kuzic); (15) Using Facebook as a Virtual Classroom in a Public University in Mexico City (Miguel Angel Herrera Batista); (16) Exploring Competency Development with Mobile Devices (Maurice DiGiuseppe, Elita Partosoedarso, Roland Van Oostveen and Francois Desjardins); (17) A Study of the Metacognition Performance in Online Learning (Ya-Ping Huang and Chiung-Sui Chang); (18) Educational Company and e-Learning (František Manlig, Eva Šlaichová, Vera Pelantová, Michala Šimúnová, František Koblasa and Jan Vavruška ); (19) Structural Constructivism as an Epistemology for Professional e-Learning: Implications & Recommendations for the Design of ECPD Pedagogical Models (Gurmit Singh and Maggie McPherson); (20) e-Learning System for Experiments Involving Construction of Practical Electric Circuits (Atsushi Takemura); (21) Component-Based Approach in Learning Management System Development (Larisa Zaitseva, Jekaterina Bule and Sergey Makarov); (22) Learning Portfolio as a Service--A Restful Style (Shueh-Cheng Hu, I-Ching Chen and Yaw-Ling Lin); (23) Context Aware Recommendations in the Course Enrollment Process Based on Curriculum Guidelines (Vangel V. Ajanovski); and (24) A Model of e-Learning Uptake and Continued Use in Higher Education Institutions (Nakarin Pinpathomrat, Lester Gilbert and Gary B Wills). Reflections papers in these proceedings include: (1) The Development of Logical Structures for e-Learning Evaluation (Uranchimeg Tudevdagva, Wolfram Hardt and Jargalmaa Dolgor); (2) Ethics in e-Learning (Alena Bušíková and Zuzana Melicheríková); (3) A Comparative Study of e-Learning System for Smart Education (SangJin An, Eunkyoung Lee and YoungJun Lee); (4) Alternative Assessment Techniques for Blended and Online Courses (Brenda C. Litchfield and John V. Dempsey); (5) Assessing the Structure of a Concept Map (Thanasis Giouvanakis, Haido Samaras, Evangelos Kehris and Asterios Mpakavos); (6) Implementations for Assessing Web 2.0 on Education (Gabriel Valerio and Ricardo Valenzuela); (7) Storytelling: Discourse Analysis for Understanding Collective Perceptions of Medical Education (Yianna Vovides and Sarah Inman); (8) Perception and Practice of Taiwanese EFL Learners' Making Vocabulary Flashcards on Quizlet (Chin-Wen Chien); (9) A Study of Perceptions of Online Education among Professionals (Parviz Ghandforoush); and (10) The Design of the Test Format for Tablet Computers in Blended Learning Environments: A Study of the Test Approach-Avoidance Tendency of University Students (Takeshi Kitazawa). Posters in these proceedings include: (1) Blended Lessons of Teaching Method for Information Studies in Which Students Produce a Learning Guidance Plan (Isao Miyaji); (2) Factors Affecting Teenager Cyber Delinquency (Young Ju Joo, Kyu Yon Lim, Sun Yoo Cho, Bo Kyung Jung and Se Bin Choi); (3) Personalized Virtual Learning Environment from the Detection of Learning Styles (M. L. Martínez Cartas, N. Cruz Pérez, D. Deliche Quesada, and S. Mateo Quero); (4) Distance Online Course for Librarian in Mongolia, Reflection and Learned Lesson (Uranchimeg Tudevdagva and Garamkhand Surendeleg); (5) The Design and Development of a Computerized Attention-Training Game System for School-Aged Children (Tsui-Ying Wang and Ho-Chuan Huang); (6) Discovering Visual Scanning Patterns in a Computerized Cancellation Test (Ho-Chuan Huang and Tsui-Ying Wang); and (7) The Effects of Self-Determination on Learning Outcomes in a Blended Learning (Young Ju Joo, Kyu Yon Lim, Sang Yoon Han, Yoo Kyoung Ham and Aran Kang). Luís Rodrigues is an associate editor of the proceedings. Individual papers contain references. An author index is included.

We welcome you to the International Conference on Education and New Developments 2014, taking place in Madrid, Spain, from 28 to 30 of June, 2014. Education, as an important right in our contemporary world, began since we exist. Knowledge and skills were passed by adults to the young, and cultures began to extend their experiences through various forms. Schools and academies were formed since the most ancient civilizations. Although between innumerous difficulties, these experiences were capable to teach us how to develop better formative effects and to turn education a generalized and global right. Formal education and other educational practices are used by all of us in 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. This international conference seeks to provide 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 2014 received over more 292 submissions, from 40 different countries, reviewed by a double-blind process. Submissions were prepared to take form of Oral Presentations, Posters, Virtual Presentations and Workshops. It were accepted for presentation in the conference, 83 submissions (28% acceptance rate). The conference also includes a keynote presentation from the distinguished Professor Hanna David, Tel Aviv University (Emerita), Israel, to whom we express our most gratitude. This volume is composed by the proceedings of the International Conference on Education and New Developments (END 2014), organized by the World Institute for Advanced Research and Science (W.I.A.R.S.) and co-sponsored by the respected partners 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 covers 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; Extracurricular 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 IADIS CELDA 2012 Conference intention was to address the main issues concerned with evolving learning processes and supporting pedagogies and applications in the digital age. There had been advances in both cognitive psychology and computing that have affected the educational arena. The convergence of these two disciplines is increasing at a fast pace and affecting academia and professional practice in many ways. Paradigms such as just-in-time learning, constructivism, student-centered learning and collaborative approaches have emerged and are being supported by technological advancements such as simulations, virtual reality and multi-agents systems. These developments have created both opportunities and areas of serious concerns. This conference aimed to cover both technological as well as pedagogical issues related to these developments. The IADIS CELDA 2012 Conference received 98 submissions from more than 24 countries. Out of the papers submitted, 29 were accepted as full papers. In addition to the presentation of full papers, short papers and reflection papers, the conference also includes a keynote presentation from internationally distinguished researchers. Individual papers contain figures, tables, and references.

This document contains the second volume of the proceedings of the 30th Annual Conference of the International Group for the Psychology of Mathematics Education. Conference presentations are centered around the theme "Mathematics at the Centre." This volume features 60 research reports by presenters with last names beginning between Abr and Dri: (1) The Odds of Understanding the Law of Large Numbers: A Design for Grounding Intuitive Probability in Combinatorial Analysis (Dor Abrahamson and Rose M. Cendak); (2) Imaginary-Symbolic Relations, Pedagogic Resources and the Constitution of Mathematics for Teaching in In-Service Mathematics Teacher Education (Jill Adler and Zain Davis); (3) Relationship between Pre-Service Mathematics Teachers' Teaching and Learning Beliefs and Their Practices (Hatice Akkoc and Feral Ogan-Bekiroglu); (4) Teachers' Awareness of Dimensions of Variation: A Mathematics Intervention Project (Thabit Al-Murani); (5) The Student Teacher and the Others: Multimembership on the Process of Introducing Technology in the Classroom (Nelia Amado and Susana Carreira); (6) Improving Student Teachers' Understanding of Fractions (Solange Amorim Amato); (7) Autodidactic Learning of Probabilistic Concepts through Games (Miriam Amit and Irma Jan); (8) Graduate Students' Processes in Generating Examples of Mathematical Objects (Samuele Antonini); (9) Reasoning in an Absurd World: Difficulties with Proof by Contradiction (Samuele Antonini and Maria Alessandra Mariotti); (10) Will Penelope Choose Another Bridegroom? Looking for an Answer through Signs (Ferdinando Arzarello, Luciana Bazzini, Francesca Ferrara, Ornella Robutti, Cristina Sabena, and Bruna Villa); (11) Motivation and Perceptions of Classroom Culture in Mathematics of Students across Grades 5 to 7 (Chryso Athanasiou and George N. Philippou); (12) Deductive Reasoning: Different Conceptions and Approaches (Michal Ayalon and Ruhama Even); (13) The Tendency to Use Intuitive Rules among Students with Different Piagetian Cognitive Levels (Reuven Babai); (14) Coming to Appreciate the Pedagogical Uses of CAS (Lynda Ball and Kaye Stacey); (15) Students' Conceptions of "m" and "c": How to Tune a Linear Function (Caroline Bardini and Kaye Stacey); (16) A Contradiction between Pedagogical Content Knowledge and Teaching Indications (Ibrahim Bayazit and Eddie Gray); (17) Identifying and Supporting Mathematical Conjectures through the Use of Dynamic Software (David Benitez Mojica and Manuel Santos Trigo); (18) Students Constructing Representations for Outcomes of Experiments (Palma Benko and Carolyn A. Maher); (19) Logarithms: Snapshots from Two Tasks (Tanya Berezovski and Rina Zazkis); (20) Trying to Reach the Limit--The Role of Algebra in Mathematical Reasoning (Christer Bergsten); (21) Semiotic Sequence Analysis--Constructing Epistemic Types Empirically (Angelika Bikner-Ahsbahs); (22) Service Teaching: Mathematical Education of Students of Client Departments (Erhan Bingolbali, John Monaghan, and Tom Roper); (23) Students' Thinking about the Tangent Line (Irene Biza, Constantinos Christou, and Theodossios Zachariades); (24) Habermas' Theory of Rationality as a Comprehensive Frame for Conjecturing and Proving in School (Paulo Boero); (25) Extending Students' Understanding of Decimal Numbers via Realistic Mathematical Modeling and Problem Posing (Cinzia Bonotto); (26) Different Media, Different Types of Collective Work in Online Continuing Teacher Education: Would You Pass the Pen, Please? (Marcelo C. Borba and Rubia B. A. Zulatto); (27) Reformulating "Mathematical Modelling" in the Framework of the Anthropological Theory of Didactics (Marianna Bosch, Fco. Javier Garcia, Josep Gascon, and Luisa Ruiz Higueras); (28) Students' Impressions of the Value of Games for the Learning of Mathematics (Leicha A. Bragg); (29) The Transition from Arithmetic to Algebra: To Reason, Explain, Argue, Generalize and Justify (Trygve Breiteig and Barbro Grevholm); (30) Resisting Reform Pedagogy: Teacher and Learner Contributions (Karin Brodie); (31) Manifestations of Affordances of a Technology-Rich Teaching and Learning Environment (TRTLE) (Jill P. Brown); (32) Types of Representations of the Number Line in Textbooks (Alicia Bruno and Noemi Cabrera); (33) Educational Neuroscience: New Horizons for Research in Mathematics Education (Stephen R. Campbell); (34) Variability in a Probability Context: Developing Pre-Service Teachers' Understanding (Daniel L. Canada); (35) Implementing a Reform-Oriented Mathematics Syllabus: A Survey of Secondary Teachers (Michael Cavanagh); (36) Student's Modelling with a Lattice of Conceptions in the Domain of Linear Equations and Inequations (Hamid Chaachoua, Marilena Bittar, and Jean-Francois Nicaud); (37) Using Reading and Coloring to Enhance Incomplete Prover's Performance in Geometry Proof (Ying-Hao Cheng and Fou-Lai Lin); (38) Aspects of Teachers' Pedagogical Content Knowledge for Decimals (Helen Chick, Monica Baker, Thuy Pham, and Hui Cheng); (39) Collaborative Action Research on Implementing Inquiry-Based Instruction in an Eighth Grade Mathematics Class: An Alternative Mode for Mathematics Teacher Professional Development (Erh-Tsung Chin, Yung-Chi Lin, Yann-Tyng Ko, Chi-Tung Chien, and Hsiao-Lin Tuan); (40) Routine and Novel Mathematical Solutions: Central-Cognitive or Peripheral-Affective Participation in Mathematics Learning (Mei-Shiu Chiu); (41) The Role of Self-Generated Problem Posing in Mathematics Exploration (Victor V. Cifarelli and Jinfa Cai); (42) A Longitudinal Study of Children's Mental Computation Strategies (Barbara Clarke, Doug M. Clarke, and Marj Horne); (43) Assessing Fraction Understanding Using Task-Based Interviews (Doug M. Clarke, Michal Sukenik, Anne Roche, and Annie Mitchell); (44) Evaluation of a Teaching Concept for the Development of Problem Solving Competences in Connection with Self-Regulation (Christina Collet and Regina Bruder); (45) Developing Probability Thinking in Primary School: A Case Study on the Constructive Role of Natural Language in Classroom Discussions (Valeria Consogno, Teresa Gazzolo, and Paulo Boero); (46) Collaboration with Teachers to Improve Mathematics Learning: Pedagogy at Three Levels (Tom J. Cooper, Annette R. Baturo, and Edlyn J. Grant); (47) "Aim High--Beat Yourself": Effective Mathematics Teaching in a Remote Indigenous Community (Tom J. Cooper, Annette R. Baturo, Elizabeth Warren, and Edlyn J. Grant); (48) Development of Children's Understanding of Length, Area, and Volume Measurement Principles (Margaret Curry, Michael Mitchelmore, and Lynne Outhred; (49) Mathematics-for-Teaching: The Cases of Multiplication and Division (Brent Davis, Elaine Simmt, and Dennis Sumara); (50) Generative Concept Images (Gary E. Davis and Catherine A. Pearn); (51) Developmental Assessment of Data Handling Performance Age 7-14 (Pauline Davis, Maria Pampaka, Julian Williams, and Lawrence Wo); (52) The Effect of Different Teaching Tools in Overcoming the Impact of the Intuitive Rules (Eleni Deliyianni, Eleni Michael, and Demetra Pitta-Pantazi); (53) Investigating Social and Individual Aspects in Teacher's Approaches to Problem Solving (Fien Depaepe, Erik De Corte, and Lieven Verschaffel); (54) Maths Avoidance and the Choice of University (Pietro Di Martino and Francesca Morselli); (55) Primary Students' Reasoning about Diagrams: The Building Blocks of Matrix Knowledge (Carmel M. Diezmann); (56) Integrating Errors into Developmental Assessment: "Time" for Ages 8-13 (Brian Doig, Julian Williams, Lawrence Wo, and Maria Pampaka); (57) Vygotsky's Everyday Concepts/Scientific Concepts Dialectics in School Context: A Case Study (Nadia Douek); (58) Creating Mathematical Models with Structures (Katherine Doyle); (59) Mechanisms for Consolidating Knowledge Constructs (Tommy Dreyfus, Nurit Hadas, Rina Hershkowitz, and Baruch Schwarz); and (60) Reconciling Factorizations Made with CAS and with Paper-and-Pencil: The Power of Confronting Two Media (Paul Drijvers, Carolyn Kieran, Andre Boileau, Fernando Hitt, Denis Tanguay, Luis Saldanha, and Jose Guzman). (Individual papers contain references.)

The Association for the Advancement of Computing in Education (AACE) is an international, non-profit educational organization. The Association's purpose is to advance the knowledge, theory, and quality of teaching and learning at all levels with information technology. "EdMedia + Innovate Learning: World Conference on Educational Media and Technology" took place in Amsterdam, The Netherlands, June 25-29, 2018. These proceedings contain 308 papers, including 14 award papers. The award papers cover topics such as Open Education Resources (OER) certification for higher education; a cooperative approach to the challenges of implementing e-assessments; developing an e-learning system for English conversation practice using speech recognition and artificial intelligence; the Learning Experience Technology Usability Design Framework; developing strategies for digital transformation in higher education; pre-service teachers' readiness to use Information and Communication Technology (ICT) in education; teacher development through technology in a short-term study abroad program; Austria's higher education e-learning landscape; a digitised educational application focused on the water cycle in nature carried out in a secondary school in Ireland; evaluative research on virtual and augmented reality for children; how children use computational thinking skills when they solve a problem using the Ozobot; a strategy to connect curricula with the digital world; the learning portfolio in higher education; and adult playfulness in simulation-based healthcare education. [For the 2017 proceedings, see ED605571.]

This document contains the fifth volume of the proceedings of the 30th Conference of the International Group for the Psychology of Mathematics Education. Conference presentations are centered around the theme "Mathematics at the Centre." This volume features 59 research reports by presenters with last names beginning between Sac and Zaz: (1) Bryan's Story: Classroom Miscommunication about General Symbolic Notation and the Emergence of a Conjecture during a CAS-Based Algebra Activity (Ana Isabel Sacristan and Carolyn Kieran); (2) A Teacher's Method to Introduce Story-Problems: Student-Generated Problems (Adalira Saenz-Ludlow); (3) "There's More than Meets the Eye": Analysing Verbal Protocols, Gazes and Sketches on External Mathematical Representations (Jonathan P. San Diego, James Aczel, Barbara Hodgson, and Eileen Scanlon); (4) Notions of Variability in Chance Settings (Ernesto Sanchez and Miguel Mercado Martinez); (5) Elementary Preservice Teacher Learning Levels (Victoria Sanchez and Miguel Mercado Martinez); (6) Mathematics Achievement: Sex Differences vs. Gender Differences (Dora Santos, Sonia Ursini, Martha Patricia Ramirez, and Gabriel Sanchez); (7) Self Assessment and Appropriation of Assessment Criteria (Leonor Santos and Anabela Gomes); (8) Drawing as Problem-Solving: Young Children's Mathematical Reasoning through Pictures (Carole Saundry and Cynthia Nicol); (9) The Role of the Teacher in Turning Claims to Arguments (Baruch Schwarz, Rina Hershkowitz, and Shirly Azmon); (10) Learning Mathematics for Teaching (Nanette Seago and Lynn Goldsmith); (11) Coherence of Mathematics Lessons in Japanese Eighth-Grade Classrooms (Yasuhiro Sekiguchi); (12) Triangle Property Relationships: Making the Connections (Penelope Serow); (13) Access to Mathematics versus Access to the Language of Power (Mamokgethi Setati); (14) Compartmentalization of Representation in Tasks Related to Addition and Subtraction Using the Number Line (Myria Shiakalli and Athanasios Gagatsis); (15)The Derivation of a Learning Assessment Framework for Multiplicative Thinking (Dianne Siemon, John Izard, Margarita Breed, and Jo Virgona); (16) Sources of Students' Frustration in Bridging Mathematics Courses (Anna Sierpinska); (17) What Makes a Good Problem? An Aesthetic Lens (Nathalie Sinclair and Sandra Crespo); (18) Discovering a Rule and Its Mathematical Justification in Modeling Activities Using Spreadsheet (Hong-chan Son and Hee-chan Lew); (19) Investigating Preservice Teachers' Understanding and Strategies on a Student's Errors of Reflective Symmetry (Ji-Won Son); (20) Exploring the Role Played by the Remainder in the Solution of Division Problems (Alina Galvao Spinillo and Sintria Labres Lautert); (21) Incomplete or Incorrect Understanding of Decimals: An Important Deficit for Student Nurses (Vicki Steinle and Robyn Pierce); (22) Proportional Reasoning: Variable Influencing the Problems Difficulty Level and One's Use of Problem Solving Strategies (Olof Bjorg Steinthorsdottir); (23) The Impact of the Intuitive Rule "If A Then B, If Not A Then Not B" in Perimeter and Area Tasks (Lambros Stephanou and Demetra Pitta-Pantazi); (24) Process-Object Difficulties in Linear Algebra: Eigenvalues and Eigenvectors (Sepideh Stewart and Michael O. J. Thomas); (25) Conceptual Changes as Dialectical Transformation (Nadia Stoyanova Kennedy); (26) Content Knowledge for Mathematics Teaching: The Case of Reasoning and Proving (Andreas J. Stylianides and Gabriel J. Stylianides); (27) "Making Proof Central to Pre-High School Mathematics Is an Appropriate Instructional Goal": Provable, Refutable, or Undecidable Proposition? (Gabriel J. Stylianides and Andreas J. Stylianides); (28) Power and Poverty--Whose, Where, and Why?: School Mathematics, Context and the Social Construction of "Disadvantage" (Dalene M. Swanson); (29) Documenting Learning in School-Based Mathematics Communities of Teachers (Paola Sztajn); (30) Research and Teaching--Can One Person Do Both? A Case Study (MichalTabach); (31) Computer "Knowledge" and Student's Images of Figures: The Case of Dragging (Varda Talmon and Michal Yerushalmy); (32) Graphics Calculators for Mathematics Learning in Singapore and Victoria (Australia): Teachers' Views (Hazel Tan and Helen J. Forgasz); (33) Vague Language in Greek and English Mathematical Talk: A Variation Study in Face-Work (Konstantinos Tatsis and Tim Rowland); (34) Teachers Using Computers in Mathematics: A Longitudinal Study (Michael O. J. Thomas); (35) Analysing Classroom Interactions Using Critical Discourse Analysis (Steve Thornton and Noemi Reynolds); (36) Pre-Service and In-Service Mathematics Teachers' Concept Images of Radian (Tahsin Topcu, Mahmut Kertil, Hatice Akkoc, Kamil Yilmaz, and Osman Onder); (37) Adaptive Expertise in the Number Domain 20-100 (Joke Torbeyns, Lien Vanderveken, Lieven Verschaffel, and Pol Ghesquiere); (38) Mathematical Activity in a Technological Workplace: Results from an Ethnographic Study (Chrissavgi Triantafillou and Despina Potari); (39) Pupils' Over-Use of Proportionality on Missing-Value Problems: How Numbers May Change Solutions (Wim Van Dooren, Dirk De Bock, Marleen Evers, and Lieven Verschaffel); (40) Arithmetical Procedures in the Solution of a Problem Involving Velocity (Veronica Vargas and Jose Guzman); (41) Introducing Algebraic Thinking to 13 Year-Old Students: The Case of the Inequality (Petros Verikios and Vassiliki Farmaki); (42) Why Is a Discontinuous Function Differentiable? (Antti Viholainen); (43) Overgeneralization of Linear Models: Presence and Characteristics among University Students (Monica Villareal, Cristina Esteley, and Humberto Alagia); (44) Educational Design Research in Mozambique: Starting Mathematics from Authentic Resources (Pauline Vos, Tiago G. Devesse, and Assane Rassul); (45) "The Big Test": A School Community Experiences Standardized Mathematics Assessment (Fiona Walls); (46) Numeracy Reform in New Zealand: Factors that Influence Classroom Enactment (Margaret Walshaw and Glenda Anthony); (47) An Investigation of Factors Influencing Teachers' Scoring Student Responses to Mathematics Constructed-Response Assessment Tasks (Ning Wang and Jinfa Cai); (48) Teacher Actions that Assist Young Students to Write Generalizations in Words and in Symbols (Elizabeth Warren); (49) Promoting Pre-Service Teachers' Understanding of Decimal Notation and Its Teaching (Wanty Widjaja and Kaye Stacey); (50) Impetus to Explore: Approaching Operational Deficiency Optimistically (Gaye Williams); (51) Generating and Evaluating Geometry Conjectures with Self-Directed Experiments (Chao-Jung Wu, Wing-Kwong Wong, Ying-Hao Cheng, and Yunn-Wen Lien); (52) The Distributions of van Hiele Levels of Geometric Thinking among 1st and 6th Graders (Der-bang Wu and Hsiu-Ian Ma); (53) Elementary Teacher Education and Teacher Efficacy toward Mathematics and Science (Su-Chiao Wu and Yu Liang Chang); (54) Spatial Rotation and Perspective Taking Abilities in Relation to Performance in Reflective Symmetry Tasks (Xenia Xistouri and Demetra Pitta-Pantazi); (55) Elementary Teachers' Mathematics Beliefs and Teaching Practices after a Curriculum Reform (Shirley M. Yates); (56) Inquiry Activities in a Classroom: Extra-Logical Processes of Illumination vs. Logical Process of Deductive and Inductive Reasoning. A Case Study (Oleksiy Yevdokimov); (57) Developments of a Child's Fraction Concepts with the Help of Psychological Tools: A Vygotsky's Cultural-Historical Perspective (Kaori Yoshida); (58) A Teacher's Treatment of Examples as Reflection of Her Knowledge-Base (Orit Zaslavsky, Guershon Harel, and Alfred Manaster); and (59) Cognitive Conflict and its Resolution via Pivotal/Bridging Example (Rina Zazkis and Egan Chernoff). (Individual papers contain references.)