Dr Dimitrios Deslis holds a PhD in Mathematics Education from the University of Cambridge, UK. The title of his doctoral thesis was: “Lakatos-style proving activity in primary school: A mixed-methods study to explore and support teachers’ mathematical knowledge and views”. He currently teaches at the Department of Primary Education of the University of Crete, Greece, and has previously worked as an Academic Researcher at the University of Oxford, UK.

He holds two master’s degrees: an MPhil in Educational Research from the University of Cambridge, UK and an MA in Science and Mathematics Education from the Aristotle University of Thessaloniki, Greece. He completed his undergraduate studies at the Faculty of Primary Education at the Aristotle University of Thessaloniki, Greece, and has worked as a primary school teacher. Additionally, he has extensive experience in non-formal education, having participated in over 25 educational programs across more than 20 countries.

He is a regular member of the Editorial Board and the TWG Leadership Team of the conference “Congress of the European Society for Research in Mathematics Education (CERME)” (Hungary, 2023; Italy, 2025; Slovakia, 2027) and serves on the Organising Committee of the conference “ERME ETC: Argumentation and Proof in Teaching and Learning of Mathematics and Interactions with other Disciplines” (Italy, 2026). He is also an active member of the Hellenic Association of Researchers in Mathematics Education (ΕνΕΔιΜ).

He has published research papers and articles in international and national conferences, academic journals, and edited volumes. His research focuses on the teaching and learning of mathematics, with a particular emphasis on mathematical proof and argumentation, problem-solving, probability and statistics, and teacher education. Additionally, he explores the use of digital learning environments, literature, movies, video games, and comics in Mathematics Education. His work also embraces interdisciplinary perspectives, connecting Mathematics and Mathematics Education with other fields, including Science, Philosophy, History, Psychology, and the Arts.