Gappa, Usamah Maming. “Development Of Learning Devices Of Direct Teaching Model For Grade Vii Students On The Concept Of Quadrangles”. Journal of Strategy and Transformation in Educational Management 1, no. 2 (November 1, 2024): 53–66. Accessed November 28, 2025. https://jostem.professorline.com/index.php/journal/article/view/10.