Effectiveness of Heads of Schools in Supervising Teachers’ Teaching Activities in Secondary Schools in Kagera Region, Tanzania. International Journal of Scientific Research and Management (IJSRM), [S. l.], v. 6, n. 04, p. SH–2018, 2018. DOI: 10.18535/ijsrm/v6i4.sh04. Disponível em: https://ijsrm.net/index.php/ijsrm/article/view/1413.. Acesso em: 27 apr. 2024.