“… 3 We identified five causal studies on coaching in developing contexts: Albornoz et al (2017), Cilliers and Taylor (2017), Harvey (1999), Piper and Zuilkowski (2015), and Sailors et al (2014). For a synthesis of the evidence on in-service teacher training programs in the international context, see Timperley, Wilson, Barrar, and Fung (2008) and Popova, Evans, and Arancibia (2016). …”