“…In support of these findings, other studies (i.e., Doğan, Çakıroğlu, Çavuş, Bilican, & Arslan, 2011;Yiğit & Altun, 2011) suggested that teachers should be supported in their classroom practices after in-service education programs. Considering the findings of the research around the world (e.g., Bryk et al, 2015;Coburn & Penuel, 2016;Geiger, Muir, & Lamb, 2016;Penuel et al, 2011;Steinberg, Empson, & Carpenter, 2004), therefore, it is perspicuous that in-service education programs in Turkey should be based on teacherresearcher collaboration in school settings, with on-going supports especially when implementing new educational approaches since they face to confusion of "old-new" dilemma (Toluk-Uçar & Demirsoy, 2010). Thus, this study focuses on professional collaboration with teachers in their teaching environment.…”