“COMPARATIVE EFFECTS OF TEACHING WITH IMPROVISED INSTRUCTIONAL MATERIALS AND STANDARD INSTRUCTIONAL MATERIALS ON SECONDARY SCHOOL STUDENTS’ ACADEMIC RETENTION IN CHEMISTRY” (2022) UNIZIK Journal of STM Education, 5(1), pp. 24–36. Available at: https://journals.unizik.edu.ng/jstme/article/view/1495 (Accessed: 27 September 2026).