Beulah, Ofem Ijeoma. “Comparative Effects of Video Projection, Powerpoint Instructional Package and Traditional Teaching Methods on Students’ Performance in Basic Science”. International Journal of Social Sciences and Humanities Invention 3, no. 11 (November 30, 2016). Accessed November 26, 2024. https://valleyinternational.net/index.php/theijsshi/article/view/631.