Kristiani, Tutik, Ahmad Suriansyah, and Metroyadi. “Instructional Leadership, Progressive Professional Development, Work Motivation, and the Assessment Results of Elementary School Teacher Competency ”. Journal of K6 Education and Management 2, no. 3 (May 31, 2020): 234-241. Accessed November 11, 2026. https://j-k6em.org/index.php/jkemorg/article/view/296.