“Penerapan Model Pembelajaran Kooperatif Dengan Pendekatan Struktural Bersama Kepala Bernomor Untuk Meningkatkan Pencapaian Kompetensi Matematika Siswa Kelas VIII C SMP: Application of Cooperative Learning Model With Numbered Heads Together Structural Approach to Improve Achievement of Mathematicals Competence of Students in Class VIII C SMP”. Talenta Conference Series: Science and Technology (ST) 2, no. 2 (June 30, 2019). Accessed May 1, 2026. https://talentaconfseries.usu.ac.id/index.php/st/article/view/547.