“The Real State of In-Service Teacher Training For Science Teachers at Secondary School from the Points of Views of Teachers Supervisor and Education Experts in Khartoum State: 2.2 THE CONCEPT OF PLANNING”, Soc. sci. humanities j., vol. 3, no. 05, pp. 1151–1163, May 2019, Accessed: May 10, 2024. [Online]. Available: https://sshjournal.com/index.php/sshj/article/view/379