“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” (2019) Social Science and Humanities Journal (SSHJ), 3(05), pp. 1151–1163. Available at: https://sshjournal.com/index.php/sshj/article/view/379 (Accessed: 10 May 2024).