I am an associate professor of the department of mathematics education at Mokpo National University(MNU).Â
Department of Mathematics Education, Mokpo National University, 1666, Yeongsan-ro, Cheonggye-myeon, Muan-gun, Jeollanam-do, 58554, Republic of Korea
e-mail: junho@mokpo.ac.kr, jhleee@kias.re.kr