“…This research underscores the importance of developing students' views about science through argumentation in the constructions of shared social knowledge via discourse about SSI (e.g., . While many science educators acknowledge the importance of rich and diverse classroom discussions in the promotion of scientific literacy (Aikenhead, 1985(Aikenhead, , 2000Driver, Newton, & Osborne, 2000;Vellom, 1999;Zeidler, 1984Zeidler, , 1997Zeidler, Lederman, & Taylor, 1992), those who seek to study it have difficulty locating substantive argumentation or classroom discussions in school (Newton, Driver, & Osborne,1999), or find the quantity and quality of discussion with explicit focus on science content very low (Levinson, 2003). Perhaps this is because teachers find it difficult to implement sustained student discourse with confidence because of the complex nature of argumentation.…”