The centrality of nature of science (NOS) to precollege science education cannot be overstated. NOS has been, and continues to be accorded a central position among the few major themes that cut across reform documents in science educa- tion around the globe both past (Robinson 1965 ) and present (Millar and Osborne 1998 ) . Vigorous emphasis on helping learners develop informed understandings of NOS dates back to the 1950s (Wilson 1954 ) . Since then, such emphasis has been accompanied by intensive lines of research that targeted assessing students’ and teachers’ views of NOS (see Driver et al. 1996 ; Lederman et al. 1998 ) , devel- oping and investigating curricular materials and pedagogical approaches to help students (see Lederman 1992 ; Meichtry 1993 ) and teachers (see Abd-El-Khalick and Lederman 2000 ) internalize more accurate understandings of NOS, and inves- tigating factors and approaches mediating and facilitating the translation of teach- ers’ understandings of NOS into classroom practice.