“ACHIEVEMENT MOTIVATION AND SELF-CONCEPT AS PREDICTOR OF ACADEMIC ACHIEVEMENT OF SECONDARY SCHOOL STUDENTS IN BIOLOGY IN ANAMBRA” (2022) UNIZIK Journal of STM Education, 5(1), pp. 64–74. Available at: https://journals.unizik.edu.ng/jstme/article/view/1498 (Accessed: 20 June 2025).