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. [Internet]. 2019 May 27 [cited 2024 Nov. 23];3(05):1151-63. Available from: https://sshjournal.com/index.php/sshj/article/view/379