Effect of Guided Discovery Teaching Method under Individualized and Group Learning Conditions on Secondary Students Retention in Trigonometry in Katsina State. AJLLLSE [Internet]. 2025 Feb. 11 [cited 2026 Jan. 27];3(2):142-53. Available from: https://grnjournal.us.e-scholar.org/index.php/STEM/article/view/6854