“…From an international perspective, research indicates the significance of preschool teachers to the quality of activities and thus to children's learning and development (e.g., Chambers, Cheung, & Slavin, 2016;Guo, Wang, Hall, Breit-Smith, & Busch, 2016;Sullivan & Bers, 2016;Sylva, Melhuish, Sammons, Siraj-Blatchford, & Taggart, 2010;Wang, Firmender, Power, & Byrnes, 2016;Wyatt & Chapman-De-Sousa, 2017). In a literature review including 1 The paper is based on a three-year research project, -2018.…”