Who Speaking?
Ir. Budhi Arta Surya., M.Sc., Ph.D
Mathematics / Victoria University of Wellington - New Zealand
Prof. Masami Isoda
Mathematics Education / University of Tsukuba - Japan
Prof. Dr. Matthias Ludwig
Mathematics Education /Goethe-Universität - Germany
Dr. Meira Parma Dewi, S.Sc., M.Kom
Mathematics / Universitas Negeri Padang - Indonesia