Erlina Dwi Prasekti (Program Studi Pendidikan Matematika, Program Pascasarjana, Universitas Negeri Yogyakarta, Indonesia)
Marsigit Marsigit (Program Studi Pendidikan Matematika, Program Pascasarjana, Universitas Negeri Yogyakarta, Indonesia)
Nana Sumarna (Department of Primary School Teacher Education, Faculty of Teaching and Educational Sciences, Halu Oleo University, Indonesia)
Rusnawati Rusnawati (Study Program of Social Sciences, Faculty of Teacher Training and Educational Sciences, Halu Oleo University, Indonesia)
Ice Rahmawati (The Education Office of Kendari City, Southeast Sulawesi, Indonesia)
Esti Rahayu (SMP Negeri 3 Pengadegan
Desa Pasunggingan, Kabupaten Purbalingga, Jawa Tengah, Indonesia)
Hartono Hartono (Jurusan Pendidikan Matematika, Universitas Negeri Yogyakarta,
Jalan Colombo No. 1, Karangmalang, Yogyakarta 55281, Indonesia)