“…Numerous researchers in the field of science education still use this work to organise research efforts or to design and carry out research studies (e.g., Baumert et al, 2010;Hashweh, 2005;Hill, Ball, & Schilling, 2008;Lee & Luft, 2008;Loughran, Mulhall, & Berry, 2008;Park, Jang, & Chen, 2010;Schmidt et al, 2007;Tatto et al, 2007;van Driel, Beijaard, & Verloop, 2001). For example, Baumert et al (2010) helped organise their evaluation of teachers' professional knowledge by using three categories: pedagogical content knowledge (PCK), content knowledge (CK) and pedagogical knowledge (PK).…”