AN INVESTIGATION INTO SOCIAL STUDIES STUDENTS’ PERFORMANCE AND RETENTION USING BLENDED LEARNING IN UPPER BASIC EDUCATION LEVEL SCHOOLS IN DELTA STATE. JGCS [Internet]. 22 nov. 2023 [cité 3 août 2026];7(1):141-56. Disponible sur: https://journals.unizik.edu.ng/jgcs/article/view/2806