Iryna Sitak, born in 1967, received a Candidate of Pedagogical Sciences degree (PhD) from the National Pedagogical Dragomanov University, Ukraine, in 2018. Since 2012, she has been working in the field of mathematical and pedagogical modeling at The Institute of Chemical Technologies (the town of Rubizhne) of the East Ukrainian Volodymyr Dahl National University, where she is currently head of the Department of Higher Mathematics and Computer Technology. Her research interests include the issues of mathematics education. She has published a number of papers in international journals and volumes in book series.