Munje, Paul Nwati, Maria Tsakeni, and Loyiso C. Jita. 2020. “School Heads of Departments’ Roles in Advancing Science and Mathematics through the Distributed Leadership Framework”. International Journal of Learning, Teaching and Educational Research 19 (9):39-57. http://www.ijlter.myres.net/index.php/ijlter/article/view/241.