Kalu, U. E., Oti, B. A., Obioma, I. E. PERCEIVED PROBLEMS MILITATING AGAINST EFFECTIVE TEACHING AND LEARNING OF SECONDARY SCHOOL PHYSICS IN UMUAHIA NORTH LOCAL GOVERNMENT AREA, ABIA STATE. JASD [Internet]. 2024 Jun. 1 [cited 2024 Dec. 12];7(2):54-60. Available from: https://njaat.com.ng/index.php/jasd/article/view/747