“…What extent the association between principal effectiveness and teacher turnover differs for highperforming and low-performing teachers, and, furthermore, whether these associations vary by different measures of teacher performance?" (Grissom & Bartanen, 2018) ▪ How school principals consider effective and ineffective teachers is dedicated in 7 studies (Donaldson & Mavrogordato, 2018;Harris, Ingle, & Rutledge, 2014;Maharay, 2014;Master, 2014;Orphanos, 2014;Range, Hewitt, & Young, 2014;Wind et al, 2019). There are examples of the following research questions:…”