Bukar, Muhammad, and Amadu Kyauta A. M. “Impact of Video Advance Organizer on NCE Students’ Interest and Performance in Geomorphology Concepts”. The International Journal of Humanities & Social Studies 8, no. 10 (October 31, 2020). Accessed May 18, 2024. http://internationaljournalcorner.com/index.php/theijhss/article/view/156293.