“…At the same time its use has spread to the areas of teacher education (Goldman et al, 2007;Masats & Dooly, 2011), and in-service training (Borko, Jacobs, Eiteljorg, & Pittmann, 2008;Brophy, 2004), allowing teachers to observe their own classrooms (Borko et al,2008;Sherin & van Es, 2009), their colleagues' lessons (Bliss & Reynolds, 2004;Krajcik et al, 1996;Rosaen, Schram, & Herbel-Eisenmann, 2002;Seago, 2004) or practices in countries different from their own (Hiebert et al, 2003) 2 .…”