Ján Gunčaga is an associate professor of mathematics education at the Faculty of Education of Comenius University in Bratislava. His masters program focused on the teaching of mathematics and physics at the secondary level and was completed at the Faculty of Mathematics and Physics, Comenius University in Bratislava (1997). He completed his doctorate in Didactics of Mathematics in the Faculty of Science at Constantine the Philosopher University in Nitra (2004). His habilitation was at the University of Debrecen in the field of mathematics education, which belongs to the field of mathematics and computer science, in 2010. His current research interests orient toward mathematics education at the primary and lower secondary levels, the history of education, and using ICT (information and communication technologies) in educational processes. He can be reached by e-mail at guncaga@fedu.uniba.sk