“…Teachers' professional knowledge is more influenced by collaborative interactions with colleagues than by independent practice in the classroom (Akerson et al, 2009;Flint, Zisook, & Fisher, 2011;Fultak & Heredia, 2014;Gao & Wang, 2014;Jones et al, 2013;Lewis et al, 2015;So, 2013;Rytivaara & Kershner, 2012;van Driel, 2010). Therefore, it is essential to study teacher communities of practice (CoPs) in order to understand their influence on teachers' PD.…”