“…They seem promising for curriculum research and will thus be introduced to readers in this journal. (Kim, Lavonen, & Ogawa, 2009), primary science curricula in Korea and Singapore are highly centralized: There are mandatory learning outcomes, suggested pedagogies, and teaching hours (Lee, Park, Lee, & Han, 2005). Based on the national curriculum, textbooks and teacher's guidebooks have been developed and/or authorized by the government (Lim et al, 2007;Wee et al, 2011) to ensure their close alignment, a practice that has been in place for at least 20 years (Harlen, 1994).…”