A. Gagatsis

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The Effects of Different Modes of Representation on Mathematical Problem Solving.

A. Gagatsis, I. Elia, 2004 .

The role of gestures in making connections between space and shape aspects and their verbal representations in the early years: findings from a case study

A. Gagatsis, I. Elia, Marja van den Heuvel-Panhuizen, 2014 .

Geometry learning in the early years: Developing understanding of shapes and space with a focus on visualization

A. Gagatsis, I. Elia, M. Heuvel-Panhuizen, 2018 .

The Effects of Different Modes of Representation on the Solution of One-Step Additive Problems.

A. Gagatsis, I. Elia, A. Demetriou, 2007 .

Using diagrams as tools for the solution of non-routine mathematical problems

A. Gagatsis, I. Elia, Marilena Pantziara, 2009 .

The structure of students’ beliefs about the use of representations and their performance on the learning of fractions

Iliada Elia, Athanasios Gagatsis, Areti Panaoura, 2009 .

A Structural Model Related to the Understanding of the Concept of Function: Definition and Problem Solving

Iliada Elia, Athanasios Gagatsis, Areti Panaoura, 2017 .

Tracing the development of representational flexibility and problem solving in fraction addition: a longitudinal study

A. Gagatsis, E. Deliyianni, 2013 .

TOWARDS A COMPREHENSIVE THEORETICAL MODEL OF STUDENTS ’ GEOMETRICAL FIGURE UNDERSTANDING AND ITS RELATION WITH PROOF

A. Gagatsis, E. Deliyianni, A. Monoyiou, 2010 .

A THEORETICAL MODEL OF STUDENTS' GEOMETRICAL FIGURE UNDERSTANDING

A. Gagatsis, I. Elia, A. Panaoura, 2010 .

Cognitive and Metacognitive Aspects of Proportional Reasoning

Athanasios Gagatsis, Modestina Modestou, A. Gagatsis, 2010 .

Assessing Student Problem-Solving Skills

A. Gagatsis, L. Kyriakides, 2003 .

CERME 6 - WORKING GROUP 5

L. Vivier, A. Gagatsis, I. Elia, 2010 .

Students’ mathematical work on absolute value: focusing on conceptions, errors and obstacles

A. Gagatsis, I. Elia, Serkan Özel, 2016 .

THE GEOMETRICAL REASONING OF PRIMARY AND SECONDARY SCHOOL STUDENTS

A. Gagatsis, 2010 .

A didactical situation for the enhancement of meta-analogical awareness

A. Gagatsis, M. Modestou, 2013 .

Developmental, Sociocultural, Semiotic, and Affect Approaches to the Study of Concepts and Conceptual Development

A. Gagatsis, Elena Nardi, 2016 .

Exploring a High Achiever's and a Low Achiever's Strategies and Images in Early Number Work

A. Gagatsis, D. Pitta-Pantazi, 2001 .

Geometric and algebraic approaches in the concept of complex numbers

A. Gagatsis, I. Elia, A. Panaoura, 2006 .

Relations Between Secondary Pupils’ Conceptions About Functions and Problem Solving in Different Representations

Iliada Elia, Athanasios Gagatsis, Areti Panaoura, 2007 .

UNIVERSITY STUDENTS' CONCEPTIONS OF FUNCTION

A. Gagatsis, I. Elia, Anastasia Evangelidou, 2004 .

Algebraic and Geometric Approach in Function Problem Solving.

A. Gagatsis, N. Mousoulides, 2004 .

AN INTERVENTION TO THE METACOGNITIVE PERFORMANCE: SELF-REGULATION IN MATHEMATICS AND MATHEMATICAL MODELING

A. Gagatsis, A. Demetriou, A. Panaoura, 2009 .

WORKING GROUP 1 The role of metaphors and images in the learning and understanding of mathematics

A. Gagatsis, I. Elia, Christer Bergsten, 2005 .

KINDERGARTNERS’ USE OF GESTURES IN THE GENERATION AND COMMUNICATION OF SPATIAL THINKING

A. Gagatsis, I. Elia, M. Heuvel-Panhuizen, 2010 .

Preservice teachers' approaches in function problem solving: A comparative study between Cyprus and Italy 1 , 2

A. Gagatsis, A. Monoyiou, 2010 .

Representational Flexibility and Problem-Solving Ability in Fraction and Decimal Number Addition: A Structural Model

A. Gagatsis, I. Elia, A. Panaoura, 2016 .

Are registers of representations and problem solving processes on functions compartmentalized in students' thinking?

A. Gagatsis, I. Elia, N. Mousoulides, 2006 .

Can we “trace” the phenomenon of compartmentalization by using the implicative statistical method of analysis? An application for the concept of function

A. Gagatsis, I. Elia, Régis Gras, 2005 .

Classical versus vector geometry in problem solving. An empirical research among Greek secondary pupils

A. Gagatsis, Helen Demetriadou, 2001 .

A review of the research in teaching and learning the negative numbers: an “action research” concerning the application of the geometrical model of the number line

A. Gagatsis, M. Alexandrou, Maria Alexandrou, 2022, Didattica della matematica. Dalla ricerca alle pratiche d’aula.

Exploring young children’s geometrical strategies

A. Gagatsis, I. Elia, Bharath Sriraman, 2024, NOMAD Nordic Studies in Mathematics Education.

Teachers’ Attitudes Towards Their Pupils’ Mathematical Errors

A. Gagatsis, L. Kyriakides, 2000 .

Didactics of Mathematics.

Athanasios Gagatsis, A. Gagatsis, 1994 .

Arithmetic Patterns in the Arithmetic of Petros Argyros

A. Gagatsis, I. Papadaki, Elena Kiliari, 2018 .

The Role of Representations in the Understanding of Mathematical Concepts in Higher Education: The case of Function for Economics Students

A. Gagatsis, I. Elia, A. Panaoura, 2021, Journal of Research in Science Mathematics and Technology Education.

Proportional reasoning: how task variables influence the development of students' strategies from primary to secondary school

Athanasios Gagatsis, Ceneida Fernández-Verdú, Salvador Llinares, 2010 .

Students' Improper Proportional Reasoning: A result of the epistemological obstacle of “linearity”

Athanasios Gagatsis, Modestina Modestou, A. Gagatsis, 2007 .

The Significance of the Classroom Effect in Primary Schools: An Application of Creemers' Comprehensive Model of Educational Effectiveness

A. Gagatsis, L. Kyriakides, R. Campbell, 2000 .

Behind the scenes of pseudo-proportionality

A. Gagatsis, I. Elia, M. Modestou, 2008 .

THE NATURE OF MULTIPLE REPRESENTATIONS IN DEVELOPING MATHEMATICAL RELATIONSHIPS 1

Iliada Elia, Athanasios Gagatsis, Constantinos Christou, 2002 .

Exploring Different Aspects of the Understanding of Function: Toward a Four-Facet Model

Iliada Elia, Athanasios Gagatsis, Areti Panaoura, 2008 .

Communicative Interaction Situations between Children with Symptoms of Dyslexia Constructing Geometrical Figures.

A. Gagatsis, 1999 .

Cultural influences on personalized e-learning systems

Scotty D. Craig, Kenneth A. Kaufman, Susanne P. Lajoie, 2012 .

GEOMETRIC AND ALGEBRAIC APPROACHES IN THE CONCEPT OF “LIMIT” AND THE IMPACT OF THE “DIDACTIC CONTRACT”

A. Gagatsis, I. Elia, A. Panaoura, 2009 .

Ambiguity in the way of looking at geometrical figures

A. Gagatsis, P. Michael-Chrysanthou, 2014 .

Unpacking The Relation Between Spatial Abilities and Creativity in Geometry

A. Gagatsis, I. Elia, E. Avgerinos, 2021, The European Educational Researcher.

Secondary teachers’ geometrical figure apprehension: their ability to construct geometrical proof and to predict students’ difficulties

A. Gagatsis, I. Elia, Rita Panaoura, 2023, Didattica della matematica Dalla ricerca alle pratiche d'aula.

How could the Presentation of a Geometrical Task Influence Student Creativity?

A. Gagatsis, I. Elia, E. Deliyianni, 2022, Journal of Research in Science Mathematics and Technology Education.

An Insight to Students' Geometrical Figure Apprehension Through the Context of the Fundamental Educational Thought

A. Gagatsis, A. Panaoura, E. Deliyianni, 2015 .

A multidimensional approach to explore the understanding of the notion of absolute value

A. Gagatsis, A. Panaoura, 2014 .

EFFICACY BELIEFS AND ABILITY TO SOLVE VOLUME MEASUREMENT TASKS IN DIFFERENT REPRESENTATIONS

A. Gagatsis, Paraskevi Sophocleous, 2010 .

A model on the cognitive and affective factors for the use of representations at the learning of decimals

A. Gagatsis, I. Elia, A. Panaoura, 2010 .

Young children's understanding of geometric shapes: The role of geometric models

A. Gagatsis, I. Elia, 2003 .