“…Continuing professional development consists of both formal and informal learning related to intellectual, personal and social domains (De Laat, Schreurs, & Nijland, 2014), and can be seen as a "non-linear ongoing process rather than as an outcome of linear, one off training events" (Varga-Atkins, O'Brien, Burton, Campbell, & Qualter, 2010, p.42). In addition continuing professional development can be seen as "a flow of acquired knowledge, as well as participation in a learning community" (Pahor, Škerlavaj, & Dimovski, 2008). Notwithstanding the proven significance of informal learning communities, continuing professional development of teachers is almost always approached in a mainly formal manner (Villegas-Reimers, 2003;Darling-Hammond, Wei, Andree, Richardson, & Orphanos, 2009).…”