Narges Yaftian   Shahid Rajaee Teacher Training University, Tehran,, Iran, Islamic Republic of,
Saeid Barghamadi   Shahid Rajaee Teacher Training University, Tehran,, Iran, Islamic Republic of

Patrick Kyeremeh   St. Joseph's University College of Education, Bechem, Ghana,
Nixon Saba Adzifome   University of Education, Winneba, Ghana,
Emmanuel Kojo Amoah   University of Education, Winneba, Ghana

Lydia Lia Prayitno   Mathematics Education Department, Universitas PGRI Adi Buana Surabaya, Indonesia,
Purwanto Purwanto   Mathematics Education Department, State University of Malang, Indonesia,
Subanji Subanji   Mathematics Education Departement,State University of Malang, Indonesia,
Susiswo Susiswo   Mathematics Education Departement, State University of Malang, Indonesia,
Ninik Mutianingsih   Mathematics Education Departement, Universitas PGRI Adi Buana Surabaya, Indonesia

Ayten Pinar Bal   Department of Mathematics and Science, Çukurova University, Turkey,
Rumeysa Yilmaz   Social Sciences Institute, Çukurova University, Turkey,
Vildan Atas   Çukurova University, Turkey

Adriano Jr Villarosa Patac   Surigao State College of Technology, Philippines,
Louida Penera Patac   Surigao State College of Technology, Philippines,
Nicolas Ensomo Crispo   Department of Education, Philippines