EFFECT OF PROBLEM BASED LEARNING APPROACH ON ACADEMIC ACHIEVEMENT OF SECONDARY SCHOOL STUDENTS IN PHYSICS IN AWKA EDUCATION ZONE. JOURNAL OF SCIENCE EDUCATION AND RESEARCH, [S. l.], v. 8, n. 1, p. 94–126, 2026. Disponível em: https://jserpublications.org/index.php/jser/article/view/46. Acesso em: 10 jul. 2026.