Simbolon, Naeklan, Universitas Negeri Medan, Indonesia (Indonesia)
Simorangkir, Frida Marta Argareta, Lecturer in Mathematics Education Study Program, Santo Thomas Catholic University (Indonesia)
Simpun, Simpun, Faculty of Teacher Training and Education, Universitas Palangka Raya, Indonesia (Indonesia)
Simpun, Simpun
Sinaga, Ali Imran, Tarbiyah and Teacher Training Faculty, State Islamic University of North Sumatera, Medan (Indonesia)
Sinaga, Ali Imran
Sinaga, Ali Imran, Faculty of Tarbiyah and Teacher Training, Universitas Islam Negeri Sumatera Utara, Indonesia (Indonesia)
Sinaga, Bornok, Universitas Negeri Medan, Indonesia (Indonesia)
Sinaga, Erentiana Prinita, Postgraduate Program in Universitas Negeri Medan, Indonesia (Indonesia)
Sinaga, Muhammad Ishak, Universitas Negeri Medan, Indonesia (Indonesia)
Sinaga, Osbert, Department of Fine Arts, Faculty of Arts and Languages, Universitas Negeri Medan, Indonesia (Indonesia)
Sinaga, Osberth, Postgraduate Student at State University of Medan (Indonesia)
Sinaga, Reflina, Universitas Katolik Santo Thomas, Indonesia (Indonesia)
Sinaga, Roni, Department of Teacher Education for Early Childhood Education, Faculty of Sports Sciences, Universitas Negeri Medan, Indonesia (Indonesia)
Sinaga, Theodora, Lecturer in Faculty Languages and Arts, State University of Medan (Indonesia)
Sinaga, Theodora, Music Education Study Program, Faculty of Languages and Arts, Universitas Negeri Medan (Indonesia)
Sinaga, Theodora, Universitas Negeri Medan, Indonesia (Indonesia)
Sipahutar, Herbert, Universitas Negeri Medan, Indonesia (Indonesia)
Sipayung, Rohdearni Wati, Teacher Training and Science Education Faculty (FKIP), Simalungun University (USI), Simalungun (Indonesia)
Sipayung, Rohdearni Wati, Faculty of Teacher Training and Education, Universitas Simalungun, Indonesia (Indonesia)
Sipayung, Tetty Natalia, Department of Mathematics Education, Universitas Katolik Santo Thomas, Indonesia (Indonesia)
Sipayung, Tetty Natalia, Department of Mathematics Education, Catholic University of Saint Thomas, Indonesia (Indonesia)
Sirait, Albert Pauli, Faculty of Education Science, Universitas Negeri Medan, Indonesia (Indonesia)
Sirait, Aprina, Master Student in Universitas Negeri Medan (Unimed) (Indonesia)
Sirait, Magdalena, Master Student in State University of Medan (Unimed), (Indonesia)

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