“…One of the most commonly used data collection instruments is the semi-structured interview (Ashley-Welbeck & Vlachopoulos, 2020; Bueno-Villaverde et al, 2018; Sperandio & Kong, 2018; Palmer, 2016; Savage & Drake, 2016; Solano-Campos, 2017; Lochmiller et al, 2016; Quaynor, 2015; Law et al, 2012; O’Boyle, 2009; Güler & Yaltırık, 2011), and subsequently conducting a thematic analysis (Braun & Clarke, 2006) from which independent categories of analysis emerge (Sparkes & Smith, 2014). Focus groups are also used in two articles (O’Boyle, 2009; Sperandio & Kong, 2018), as well as direct observation by researchers of the development of classes in the different educational centres in which the research is conducted (Quaynor, 2015; Solano-Campos, 2017; Lochmiller et al, 2016; Kauffman, 2005; Palmer, 2016). Those investigations that include among their objectives knowing aspects related to curriculum design and school organisation have also used the analysis of the different documents that the school has made available (Bueno-Villaverde et al, 2018; O’Boyle, 2009; Karnes & Nugent, 2003).…”