“…The significance of collaborative structures and social networks for successful school improvement and continuous teacher development is underlined by studies on educational reform and school change across the globe, such as southeast Asia (Hallinger, 1998), Australia (Hollingsworth, 2004), the Netherlands (Moolenaar, Sleegers and Zijlstra, 2009;Moolenaar, Daly, and Sleegers, 2009;Veugelers and Zijlstra, 2002), Portugal (Lima, 2007(Lima, , 2009, Uganda (Hite et al, 2006), the United Kingdom (Durrant and Holden, 2006;Earl and Katz, 2007;Hargreaves, 2001Hargreaves, , 2003Hopkins and Reynolds, 2001), and the United States (Daly and Finnigan, 2009). Whether in the form of communities of practice (Wenger, 1998), learning organizations (Senge, 2006), professional learning communities (McLaughin and Talbert, 1993;Newmann and Wehlage, 1995;Stoll and Louis, 2007), or distributed leadership (Spillane, 2006), the social context, and in particular increased social interaction among all of the school's stakeholders, is believed to be at the heart of system reform and school improvement.…”