Yunisa, . A. Y. and Yunisa, . B. . (2021) “Opportunities and Challenges of Optimized Method of Teaching Using Virtual Classroom Instructional Technology During Covid-19 Pandemic in Public Secondary Schools in Nigeria”, Kashere Journal of Education , 2(1), pp. 121–128. Available at: https://journals.fukashere.edu.ng/index.php/kje/article/view/617 (Accessed: 14 March 2026).