The way a teacher uses different roles impacts on students' successful engagement in argumentative practice. This study conceptualized four critical roles for teachers-director, moderator, coach, participant-to support students in the construction of scientific argument, and explored the way three teachers used different roles in implementing the Science Writing Heuristic (SWH) approach in elementary school classrooms. Research data was accumulated over 4 years through video recordings of science classes. The Modified Reformed Teacher Observation Protocol (m-RTOP) was used to analyze videotaped science lessons. Analysis of the data indicated that there was a shift in the areas of teacher support, teacher questioning, student voice, and science argument, and the correlations among the four areas are significant (r=.83~.96, p<.01). Several levels of subsequent analysis were completed related to teacher role and student argumentation. Results indicate that the teachers increasingly played all four roles during the four years of the study, which is referred to as richness of teacher role, instead of only using the director role as they did in the first year. The results also show that these teachers learned to appropriately implement the roles in different activities and contexts, which is flexibility of teacher role. As teacher roles shifted, student voice increased and the elements of argument were practiced and more successfully represented. Finally, this study suggests that teacher professional development should be designed systematically and should consist of ongoing training rather than a one-time event.
The way a teacher uses different roles impacts on students' successful engagement in argumentative practice. This study conceptualized four critical roles for teachers-director, moderator, coach, participant-to support students in the construction of scientific argument, and explored the way three teachers used different roles in implementing the Science Writing Heuristic (SWH) approach in elementary school classrooms. Research data was accumulated over 4 years through video recordings of science classes. The Modified Reformed Teacher Observation Protocol (m-RTOP) was used to analyze videotaped science lessons. Analysis of the data indicated that there was a shift in the areas of teacher support, teacher questioning, student voice, and science argument, and the correlations among the four areas are significant (r=.83~.96, p<.01). Several levels of subsequent analysis were completed related to teacher role and student argumentation. Results indicate that the teachers increasingly played all four roles during the four years of the study, which is referred to as richness of teacher role, instead of only using the director role as they did in the first year. The results also show that these teachers learned to appropriately implement the roles in different activities and contexts, which is flexibility of teacher role. As teacher roles shifted, student voice increased and the elements of argument were practiced and more successfully represented. Finally, this study suggests that teacher professional development should be designed systematically and should consist of ongoing training rather than a one-time event.