“…A solid CK background is an essential condition, but it is not a sufficient condition for teaching science effectively in elementary schools (Oh & Kim, 2013). Schneider and Plasman (2011) suggested that understanding students' prior conceptions is the first step for developing science teachers' learning progression of PCK, but several studies indicated teachers are insensitive to students' prior conceptions as a critical constructivist component of knowledge about learners (Lin, 2016b;Lin & Chiu, 2010;Chi, Siler, & Jeong, 2004;Liang, Chou, & Chiu, 2011). Research on one-to-one tutoring has found that tutors predicted students' conceptions based on their own personal learning experiences, overestimated the accuracy of students' conceptions, and had difficulty monitoring their students' conceptions (Chi et al, 2004;Herppich, Wittwer, Nückles, & Renkl, 2013).…”