Using mobile puzzles to exhibit certain algebraic habits of mind and demonstrate symbol-sense in primary school students I Papadopoulos The Journal of Mathematical Behavior 53, 210-227, 2019 | 30 | 2019 |

Are useless brackets useful tools for teaching? C Marchini, I Papadopoulos International Group for the Psychology of Mathematics Education PME35, v.4 …, 2011 | 22* | 2011 |

Students’ use of technological tools for verification purposes in geometry problem solving I Papadopoulos, V Dagdilelis The Journal of Mathematical Behavior 27 (4), 311-325, 2008 | 18 | 2008 |

The problem-solving element in young students’ work related to the concept of area J Mamona-Downs, I Papadopoulos International Group for the Psychology of Mathematics Education 4, 121, 2006 | 16 | 2006 |

“Reinventing” techniques for the estimation of the area of irregular plane figures: From the eighteenth century to the modern classroom I Papadopoulos International Journal of Science and Mathematics Education 8 (5), 869-890, 2010 | 15 | 2010 |

Complex and non-regular shapes: Their evolution in Greek textbooks (1749–1971) I Papadopoulos Science & Education 17 (1), 115-129, 2008 | 13 | 2008 |

Exploring the way rational expressions trigger the use of “mental” brackets by primary school students I Papadopoulos, R Gunnarsson Educational Studies in Mathematics 103 (2), 191-207, 2020 | 11 | 2020 |

How Archimedes Helped Students to Unravel the Mystery of the Magical Number Pi I Papadopoulos Science & Education 23 (1), 61-77, 2014 | 11 | 2014 |

Modelling problem-solving situations into number theory tasks: the route towards generalisation I Papadopoulos, M Iatridou Mathematics Education Research Journal 22 (3), 85-110, 2010 | 9 | 2010 |

Multiple approaches to problem posing: Theoretical considerations regarding its definition, conceptualisation, and implementation I Papadopoulos, N Patsiala, L Baumanns, B Rott Center for Educational Policy Studies Journal 12 (1), 13-34, 2022 | 8 | 2022 |

The use of ‘mental’brackets when calculating arithmetic expressions I Papadopoulos, G Robert Proceedings of the 42nd Conference of the International Group for the …, 2018 | 8 | 2018 |

When the “Tug-of-War” Game Facilitates the Development of Algebraic Thinking I Papadopoulos, N Patsiala International Journal of Science and Mathematics Education, 2018 | 8 | 2018 |

Representations of creative mathematical thinking in collaborative designs of c-book units. C Papadopoulos, I., Barquero, B., Richter, A., Daskolia, M., Barajas, M ... CERME 9-Ninth Congress of the European Society for Research in Mathematics …, 2015 | 8 | 2015 |

The Theory of Transactional Distance as a Framework for the Analysis of Computer-Aided Teaching of Geometry. I Papadopoulos, V Dagdilelis International Journal for Technology in Mathematics Education 13 (4), 2007 | 8 | 2007 |

Using calculators for assessing pupils’ conceptualization on place-value I Papadopoulos International Journal of Mathematical Education in Science and Technology, 2013 | 7 | 2013 |

Systematic approaches to experimentation: The case of Pick's theorem I Papadopoulos, M Iatridou The Journal of Mathematical Behavior 29 (4), 207-217, 2010 | 7 | 2010 |

Didactic scenarios and Ict: a good practice guide V Dagdilelis, I Papadopoulos Technology Enhanced Learning. Quality of Teaching and Educational Reform …, 2010 | 7 | 2010 |

Estimating areas and verifying calculations in the traditional and computational environment I Papadopoulos, V Dagdilelis Proceedings of the 33rd Conference of the International Group for the …, 2009 | 7 | 2009 |

The rules for the order of operations: The case of an inservice teacher I Papadopoulos CERME 9-Ninth Congress of the European Society for Research in Mathematics …, 2015 | 6 | 2015 |

ICT in the Classroom Microworld-Some Reservations I Papadopoulos, V Dagdilelis Best Practices for the Knowledge Society. Knowledge, Learning, Development …, 2009 | 6 | 2009 |