Taiwo Oluwakayode Saraye. Influence of Extra Lesson on Students’ academic achievement in Chemistry Senior Student Secondary School Ibadan, Oyo Sate, Nigeria. IJNSCFRT. 2024;21(1):29-39. Accessed September 22, 2025. https://ijnscfrtjournal.isrra.org/Natural_Sciences_Journal/article/view/1279