“…To create an effective school, the principal's managerial abilities are needed which include conceptual abilities, technical abilities, and human abilities (Hersey et al, 2007;Katz, 2009;Robbin, 1990). Principal's managerial skills affect the effectiveness of the school (Mukarromah et al, 2019). Likewise in the implementation of supervision of learning (Magut, Chumba, & Kindiki, 2017;McConnell, 2016;Ujiarto, Rusdarti, Rifai, & Raharjo, 2017), the formation of school culture (Sabancı, Ahmet, Sönmez, & Yılmaz, 2016), and in improving teacher performance (Mujhiyat, Abdullah, & Akbar, 2018;Purba, Ambarita, & Siagian, 2018).…”