“…Requirements for curriculum content (and the competencies that participants must develop) suggested by education authorities for school leadership programs vary hugely among education systems and their degree of decision-making centralization (Huber, 2008; Huber and West, 2002; Fluckiger, B., Lovett and Dempster, 2014). It is also necessary to differentiate systems that demand that those who become school leaders have successfully completed some specialized training – such as in Ontario, Canada, in Singapore or in Victoria, Australia (OECD, 2007; Weinstein and Hernández, 2016) – from other systems that are more open and flexible, that only demand that school leaders have basically the same credentials that are required of teachers, even though more specialized training can be desirable – as often happens, as previously noted, in Latin American countries (UNESCO, 2014, 2015). Several authors, such as Bush and Jackson (2002), have pointed out the importance of integrating professional preparation within the career path that school systems establish for becoming a school leader, as well as connecting it with their job performance in that position.…”