“…Research focusing on PCK as a knowledge base has mostly utilised paper-and-pencil tests (Baumert et al, 2010;Großschedl, Harms, Kleickmann, & Glowinski, 2015;Hill et al, 2005;Jin, Shin, Johnson, Kim, & Anderson, 2015;Jüttner et al, 2013). Research emphasising the relevance of PCK for instructional practice in specific classrooms for specific students to teach a specific topic has typically employed more qualitative approaches (Chan & Yung, 2015;Friedrichsen et al, 2009;Mthethwa-Kunene, Onwu, & de Villiers, 2015;Nilsson & Vikström, 2015;van Driel, Jong, & Verloop, 2002). The fundamentally different approaches to define and investigate PCK still endorse its relevance to construct highquality instruction, but also hinder the process of building a coherent understanding of the construct (Park & Suh, 2015).…”