“…There are only a few empirical studies that demonstrate effects of PD on teacher outcomes, practices as well as child development (Egert et al, 2018;Werner, Linting, Vermeer, and van IJzendoorn, 2016). For instance, some researchers demonstrated positive outcomes of their PD on teacher beliefs (King, 2014;Ottley et al, 2015) and practices (Kratzmann et al, 2017;Sachse et al, 2016).…”