ZEBUA, J. E. Teachers’ Difficulties in Teaching Mathematics for Grade XI: Case Study in Nias Adventist High School. Polyhedron International Journal in Mathematics Education, [S. l.], v. 2, n. 2, p. 56–64, 2024. DOI: 10.59965/pijme.v2i2.151. Disponível em: https://nakiscience.com/index.php/pijme/article/view/151. Acesso em: 11 feb. 2026.