Attah, J. O. ., and D. . Kruger. “Beyond the Score: Rethinking TIMSS Underperformance in Participating African Countries through Open Education, Universal Design for Learning, and Self-Directed Learning”. International Journal of Learning, Teaching and Educational Research, vol. 25, no. 9, Sept. 2026, pp. 1052-76, https://www.ijlter.myres.net/index.php/ijlter/article/view/3078.