The studied schools were a nationally selected sample of restructuring schools. These researchers looked at both pedagogy and the social structure of the classrooms in examining teaching practice. In particular, through classroom observations and interviews with teachers they documented the presence of the structural support for and the characteristics of authentic pedagogy, a term that is defined in their study. Briefly, authentic pedagogy emphasizes higher order thinking, the construction of meaning through conversation, and the development of depth of knowledge that has value beyond the classroom. These researchers examine the connection between the quality of classroom pedagogy and the existence of the core characteristics of PLC. Louis and Marks (1998) documented that the presence of professional community in a school contributes to higher levels of social support for achievement and higher levels of authentic pedagogy. In fact, they note that their model accounts for 36% of the variance in the quality of classroom pedagogy providing robust support to demonstrate the impact of PLC on classroom practice.