BANNAGA TAHA AL-ZUBAIR; EL-ZAIN EL-KHALEFA EL-KHDER. OBSTACLES HINDERING THE IMPLEMENTATION OF STRATEGIC PLANNING FROM SECONDARY SCHOOL PRINCIPALS IN KHARTOUM STATE. Managere: Indonesian Journal of Educational Management, [S. l.], v. 3, n. 3, p. 118–129, 2021. DOI: 10.52627/managere.v3i3.81. Disponível em: https://serambi.org/index.php/managere/article/view/81. Acesso em: 19 apr. 2026.