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1. Introduction to algebraic thinking: connecting the concepts of linear function and linear equation, Scientia Peadagogika Experimentalis, 42(2), (2006), 231-254. (coauthors P. Verikios, N. Klaoudatos).
2. Employing genetic moments in the history of Mathematics in classroom activities, Educational Studies in Mathematics,, (2007), (coauthor T. Pashos).
3. The interaction between intuitive and formal mathematical thinking. A case study, International Journal of Mathematical Education in Science and Technology, 38(3), (2007), 353-365. (coauthor T. Pashos).
4. The transition from equation to enequality via a functional approach in a problem-solving context, submitted, (coauthor P. Verikios).
5. Integrating the History of Mathematics in educational praxis. An Euclidean geometry approach to the solution of motion problems, Proceedings of Psych. of Math. Educ.(PME) 28, 2004, 505-512, (coauthors T. Pashos, N. Klaoudatos).
6. From functions to equations: introduction of algebraic thinking to 13 year-old students, Proceedings of Psych. of Math. Educ., (PME) 28, 2004, 393-400, (coauthors P. Verikios, N. Klaoudatos).
7. The reflective abstraction in the construction of the concept of the definite integral: a case study, Proceedings of Psych. of Math. Educ., (PME) 30, 2006, 337-344, (coauthor T. Pashos).
8. Introducing algebraic thinking to 13 year-old students: the case of the inequality, Proceedings of Psych. of Math. Educ., (PME) 30, 2006, 321-328, (coauthor P. Verikios).
9. The integration of genetic moments in the History of Mathematics and Physics in the designing of didactic activities aiming to introduce first-year undergraduates to concepts of Calculus, History and Epistemology in Mathematics Education, Proceedings of 5th European Summer University, 2008, 297-310, (coauthor T. Pashos).