Sallah, E. K. . ., Owusu, A. . and Butakor, P. K. . (2023) “Problem Based Learning: Errors Minimization, Conceptual and Procedural Understanding in Trigonometry”, African Journal of Educational Studies in Mathematics and Sciences, 19(1), pp. 1-18. Available at: https://journals.uew.edu.gh/index.php/ajesms/article/view/199 (Accessed: 3December2024).