M. Ngole, Diana, and Demetria Gerold Mkulu. 2021. “The Role of School Heads’ Supervision in Improving Quality of Teaching and Learning: A Case of Public Secondary School in Ilemela District Mwanza Tanzania”. International Journal of English Literature and Social Sciences (IJELS) 6 (1). https://journal-repository.com/index.php/ijels/article/view/3020.