“…Researchers have conducted studies to examine teachers' TPACK development in science classrooms (Allan et al, 2010;Guzey & Roehrig, 2009;Hechter, 2012;Jang, 2010;Jang & Chen, 2010;Khan, 2011;Lin et al, 2013;Trautmann & MaKinster, 2010). Science teachers' TPACK has been examined through a TPACK questionnaire and the results indicated that teachers' perceptions on TPC correlated positively with the other six TPACK sub-components (i.e., TK, PK, CK, TCK, TPK, PCK, and TPC, Lin et al, 2013).…”