“Effects of Simulation, Field-Trip and Expository Strategies on Basic Science Students’Achievement and Retention taught the Concept of Pollution, in Owerri” (2024) AFRICAN JOURNAL OF EDUCATIONAL ARCHIVES (AJEA), 9(1). Available at: http://journals.benchmarkjournals.com/index.php/ajea/article/view/44 (Accessed: 26 July 2026).