“…Studies conducted with both preservice (Galguera, 2011; Jimenez-Silva & Olson, 2012) teachers, as well as in-service teachers (Brancard & Quinnwilliams, 2012) found that collaborative PD opportunities supported learning. A relatively large subset of studies found that collaborative PD between mainstream teachers and language specialists was productive in multiple ways for teacher learning, practice, and the development of a shared sense of responsibility for teaching multilingual students (Babinski, Amendum, Knotek, Sánchez, & Malone, 2018; DelliCarpini & Alonso, 2014; English, 2009; Martin-Beltrán & Peercy, 2014; Peercy & Martin-Beltrán, 2012; Peercy, Martin-Beltrán, Silverman, & Nunn, 2015; Russell, 2014, 2015; Vázquez, López, Segador, & Mohedano, 2015). Other studies highlighted the productivity of various configurations of difference and heterogeneity in partnership (Collins & Liang, 2014; Estapa, Pinnow, & Chval, 2016; Molle, 2013), illustrating the value of teachers learning to talk across difference and engage with tools and perspectives that push their thinking.…”