- Papadopoulos, I., & Ventistas, G. (2023). Collaborative geometry problem solving in secondary education: The issue of control strategies. In P. Drijvers, C. Csapodi, H. Palmér, K. Gosztonyi, & E. Kónya (Eds.). Proceedings of the Thirteenth Congress of the European Society for Research in Mathematics Education (CERME13) (pp. 781-788). Alfréd Rényi Institute of Mathematics and ERME
- Papadopoulos, I. (2023). Primary school students’ use of unnecessary brackets while evaluating arithmetic expressions. In P. Drijvers, C. Csapodi, H. Palmér, K. Gosztonyi, & E. Kónya (Eds.). Proceedings of the Thirteenth Congress of the European Society for Research in Mathematics Education (CERME13) (pp. 465-472). Alfréd Rényi Institute of Mathematics and ERME
- Papadopoulos, I., & Patsiala, N. (2023). Problem-posing training and its impact on the quality of the posed problems. In P. Drijvers, C. Csapodi, H. Palmér, K. Gosztonyi, & E. Kónya (Eds.). Proceedings of the Thirteenth Congress of the European Society for Research in Mathematics Education (CERME13) (pp. 457-464). Alfréd Rényi Institute of Mathematics and ERME
- Papadopoulos, I., & Thoma, A. (2023). Students' use of unnecessary brackets as a way of exhibiting structure sense. In M. Ayalon, B. Koichu, R. Leikin, L. Rubel & M. Tabach (Eds.). Proceedings of the 46th Conference of the International Group for the Psychology of Mathematics Education (Vol. 4, pp. 11-18). PME 46.
- Papadopoulos, I., & Patsiala, N. (2023). Seeking and using structure through problem posing. In I. Papadopoulos and N. Patsiala (Eds.) Proceedings of ProMath22 (pp. 133-148), Thessaloniki, Greece. ProMath
- Patsiala, Ν. & Papadopoulos, Ι. (2022). Developing an instrument to connect problem-posing strategies and mathematical habits of mind. Twelfth Congress of the European Society for Research in Mathematics Education (CERME12), (pp. 4181-4188). ERME
- Papadopoulos, Ι., & Karakostas, Μ. (2022) Mental calculations with rational numbers: strategies' range and strategy selection. Twelfth Congress of the European Society for Research in Mathematics Education (CERME12), (pp. 410-417), ERME
- Güler, Μ., Papadopoulos, I., & Thoma, A. (2022). Investigating Science Education students’ mathematical writing – the case of mental brackets. Proceedings of the British Society for research into Learning Mathematics, 42(1).
- Papadopoulos, I. & Patsiala, N. (2019). Capturing the problem posing landscape in a grade-4 classroom: A pilot study. In U. T. Jankvist, M. van den Heuvel-Panhuizen, & M. Veldhuis (Eds.): Proceedings of CERME 11 (pp. 4431-4438). Utrecht: Freudenthal Group & ERME.
- Gunnarsson, R., & Papadopoulos, I. (2019). Pairing numbers: an unconventional way of evaluating arithmetic expressions. In U. T. Jankvist, M. van den Heuvel-Panhuizen, & M. Veldhuis (Eds.): Proceedings of CERME 11 (pp. 435-442). Utrecht: Freudenthal Group & ERME.
- Diamantidis, D., Kynigos, C., & Papadopoulos, I. (2019). The co-design of a c-book by students and teachers as a process of meaning generation: The case of co-variation. In U. T. Jankvist, M. van den Heuvel-Panhuizen, & M. Veldhuis (Eds.): Proceedings of CERME 11 (pp. 2689-2696) . Utrecht: Freudenthal Group & ERME.
- Papadopoulos, I., Panagiotopoulou, S., & Karakostas, M. (2019). Mental calculations with rational numbers across educational levels. In U. T. Jankvist, M. van den Heuvel-Panhuizen, & M. Veldhuis (Eds.): Proceedings of CERME 11 (pp. 469-476). Utrecht: Freudenthal Group & ERME.
- Rott, B., & Papadopoulos, I. (2019). The role of problem solving in school mathematics. In A. Kuzle, I. Gebel, & B. Rott (Eds.) Proceedings of the 2018 Joint Conference of ProMath and the GDM Working Groups on Problem Solving (pp. 215-217). Munster, Germany: WTM-Verlag.
- Papadopoulos, I., & Diakidou, A., (2019). Does collaborative problem solving matter in primary school? The issue of control actions. In A. Kuzle, I. Gebel, & B. Rott (Eds.) Proceedings of the 2018 Joint Conference of ProMath and the GDM Working Groups on Problem Solving (pp. 143-157). Munster, Germany: WTM-Verlag.
- Papadopoulos, I., & Vighi, P. (2019). An unusual comparison of perimeters. In J. Novotna & H. Moraova (Eds.), Proceedings of SEMT 19 (pp. 483-485). Prague.
- Koulountzos, V., Papadopoulos, I., Lambrinos, N., & Seroglou, F. (2019). A STEM education proposal for pre-service students. In F. Seroglou & V. Koulountzos (Eds.) Book of Abstracts of the 15th International Conference of IHPST (pp. 175-176), Thessaloniki.
- Papadopoulos, I., & Gunnarsson, R. (2018). The use of ‘mental’ brackets when calculating arithmetic expressions. In E. Bergqvist, M. Österholm, C. Granberg, & L. Sumpter (Eds.). Proceedings of the 42nd Conference of the International Group for the Psychology of Mathematics Education (Vol. 3, pp. 451-458). Umeå, Sweden: PME
- Papadopoulos, I., & Sekeroglou, I. (2018). Types of control in collaborative problem-solving. In A. Ambrus & E. Vasarhelyi (Eds.), Proceedings of the 19th ProMath Conference, Eötvös Loránd University of Budapest, Hungary (pp. 97-112).
- Papadopoulos, I., Jirotkova, D., & Slezakova, J. (2017). Driving the “Bus” beyond the boundaries of the Czech Republic. In Proceedings of the 14th International Conference on Efficiency and Responsibility in Education (ERIE2017), Prague, Czech Republic (pp. 303-310).
- Kynigos, C., Daskolia, M., & Papadopoulos, I. (2017). Social creativity in the design of digital resources to afford creative mathematical thinking. In A. Chronaki (Ed.), Proceedings of the 9th International Mathematics Education and Society Conference-MES9, v.1, pp.267-271, Volos, Greece.
- Papadopoulos, I., Diamantidis, D., & Kynigos, C. (2017). Meaning-generation through an interplay between problem solving and Constructionism in the c-book technology environment. In T. Dooley & G. Gueudet (Eds.), Proceedings of the 10th Congress of the European Society for Research in Mathematics Education (pp. 2619-2626). Dublin, Ireland: DCU and ERME.
- Papadopoulos, I., & Patsiala, N. (2017). ‘Father Woodland’: A learning environment to facilitate the development of algebraic thinking. In T. Dooley & G. Gueudet (Eds.), Proceedings of the 10th Congress of the European Society for Research in Mathematics Education (pp. 456-463). Dublin, Ireland: DCU and ERME.
- Papadopoulos, I., Diamantidis, D., & Kynigos, C. (2016). Meaning around angle with digital media designed to support creative mathematical thinking. In Csikos, C., Rausch, A., & Szitanyi, J. (Eds.). Proceedings 40th Conference of the International Group for the Psychology of Mathematics Education, v.4, pp. 35-42, Szeged, Hungary: PME
- Papadopoulos, I., Kindini, T., & Tsakalaki, X. (2016). Using mobile puzzles to develop algebraic thinking. In Csikos, C., Rausch, A., & Szitanyi, J. (Eds.). Proceedings 40th Conference of the International Group for the Psychology of Mathematics Education, v.4, pp. 43-50, Szeged, Hungary: PME
- Barquero, B., Papadopoulos, I., Barajas, M., & Kynigos C. (2016). Cross-case design in using digital technologies: two communities of interest designing a c-book unit. Paper presented at ICME-13, Hamburg, Germany.
- Jirotkova, I. Papadopoulos, & R. Zemanova (2015). Desemantisation of language in learning environments. Workshop in International Seminar Elementary Maths Teaching 2015, Prague. In J. Novotna & H. Moraova (Eds.) Proceedings of the International Symposium Elementary Maths Teaching SEMT ’15 , 369-370
- Ioannis Papadopoulos & Dimitrios Deslis (2015). Equiprobable events and probability comparison in a primary classroom. In J. Novotna & H. Moraova (Eds.) Proceedings of the International Symposium Elementary Maths Teaching SEMT ’15 , 257-266.
- Papadopoulos, I. (2015). The rules for the order of operations: The case of an inservice teacher. In K. Krainer and N. Vondrova (Eds.), Proceedings of the 9th Congress of the European Society for Research in Mathematics Education (pp. 324-330). Prague.
- Papadopoulos, I., Barquero, B., Richter, A., Daskolia, M., Barajas, M., & Kynigos, C. (2015). Representations of creative mathematical thinking in designer communities producing c-book units. In K. Krainer and N. Vondrova (Eds.), Proceedings of the 9th Congress of the European Society for Research in Mathematics Education (pp. 2381-2387). Prague.
- Beliefs and Mathematical Reasoning during Problem Solving across educational levels.I. Papadopoulos (2015). In C. Bernack-Schuler, R. Erens, A. Eichler, & T. Leuders (Eds.), Views and Beliefs in Mathematics Education (pp. 183-195). Springer Fachmedien Wiesbaden.
- Ioannis Papadopoulos (2012). Nicodemus explores Egyptian fractions: A case study. In C. Kynigos, J. Clayson, N. Yiannoutsoy (Eds.), Constructionism 2012: Theory, Prqctice and Impact, Conference Proceedings (pp. 146-155). Athens.
- Carlo Marchini & Ioannis Papadopoulos (2011). Are useless brackets useful tools for teaching?. In B. Ubuz (Ed.) Proceedings 35th Conference of the International Group for the Psychology of Mathematics Education (PME 35), vol.3 pp.185-192, Ancara, Turkey: PME.
- Ioannis Papadopoulos (2010). Using simple arithmetic calculators as a diagnostic tool on place-value. In B. Majena, E. Swoboda and K. Tatsis (Eds.), Motivation Via Natural Differentiation In Mathematics, Uniwersytetu Rzeszowskiego, Rzeszow, Poland (pp. 290-299).
- Vassilios Dagdilelis & Ioannis Papadopoulos (2010). Didactic Scenarios and ICT: a good practice guide. In M. Lytras et al. (Eds): Tech-Education 2010, CCIS 73, pp. 117-123, Springer-Verlag. Berlin Heidelberg.
- Maria Iatridou & Ioannis Papadopoulos (2010). From area to number theory: a case study. In V. Durand-Guerrier, S. Soury-Lavergne and F. Arzarello (Eds.), Proceedings of the 6th Conference of European Research in Mathematics Education CERME-6, pp. 599-608. Institut National De Recherche Pedagogique, Lyon, France.
- Ioannis Papadopoulos & Vassilios Dagdilelis (2009). ICT in Classroom Microworld – Some Reservations. In M. D. Lytras et al. (Eds.) WSKS 2009, CCIS 49, pp. 137-145, Springer-Verlag Berlin Heidelberg.
- Ioannis Papadopoulos & Vassilios Dagdilelis (2009). Estimating areas and verifying calculations in the traditional and computational environment. In Tzekaki, M., Kaldrimidou, M. & Sakonidis, C. (Eds.), Proceedings of PME 33, Vol. IV, pp. 305-312, Thessaloniki, Greece: PME.
- Ioannis Papadopoulos (2008). Developing problem-solving strategies via estimating the area of irregular shapes. Proceedings of the 1st Conference of Children Mathematical Education (CME08), pp. 95-101, Uniwersytetu Rzeszowskiego, Rzeszow, Poland.
- Ioannis Papadopoulos (2007). Relating Problem-Solving Strategies and van Hiele Levels. In J. Novotna and H. Moraova (Eds.) Proceedings of the International Symposium Elementary Maths Teaching SEMT ‘07. pp. 194-202. Charles University, Faculty of Education. Prague. The Czech Republic.
- Joanna Mamona-Downs & Ioannis Papadopoulos (2006). The problem-solving element in young students’ work related to the concept of area. In Novotna J. et al (Eds.) Proceedings 30th Conference of the International Group for the Psychology of Mathematics Education (PME 30). vol.4, pp. 121-128. Prague: PME.
- Ioannis Papadopoulos & Vassilios Dagdilelis (2005). Computer as a tool of verification in a geometry problem-solving context. In Novotna J. (Ed), SEMT’ 05, International Symposium Elementary Maths Teaching Proceedings, (pp.260-268). Charles University, Faculty of Education. Prague. The Czech Republic.
- Ioannis Papadopoulos & Vassilios Dagdilelis (2005). Transactional distance and computer aided teaching of geometry. Is it present in primary schools’ ordinary classroom?. In Olivero, F. & Sutherland, R. (Eds), Visions of Mathematics Education: Embedding Technology in Learning. Proceedings of the 7th International Conference on Technology in Mathematics Teaching, vol.2, (pp.37-44). University of Bristol. Bristol-UK.
- Vassilios Dagdilelis, Ioannis Papadopoulos, (2004). “An Open Problem in the Use of Software for Educational Purposes”, In Elspeth McKay (Ed) Acquiring and Constructing Knowledge Through Human-Computer Interaction Creating New Visions for the Future of Learning, Proceedings of ICCE-2004 (pp. 919-924), RMIT University, Melbourne, Australia.
- Ioannis Papadopoulos, (2004). “Geometry Problem-Solving in a Computational Environment. Advantages and Reservations”, Paper presented at ICME-10 (International Congress on Mathematical Education), Copenhagen, Denmark.
- Ioannis Papadopoulos, Vasilios Dagdilelis, (2002). “Using computer for didactic activities on areas: a case study”, In Cockburn, A & Nardi, E (Eds). Proceedings of the 26th Annual conference of the International Group for the Psychology of Mathematics Education(PME), vol. 1, p 1-307, Norwich, UEA Norwich
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