Mwangangi, Leonard, Samson R. Ondigi, and Zutaah Puotier. “Cross-Curriculum Teaching and Learning in the Secondary School: Geography, History, Religious Education and Mathematics in Kenya’s Competency Based Curriculum”. Msingi Journal 8, no. 1 (March 19, 2024): 1–14. Accessed September 23, 2026. https://kerd.ku.ac.ke/index.php/msingi/article/view/456.