... Therefore, we needed to consider how to best capture the experiences of teachers, who sought to improve their pedagogical content knowledge and skills (Shulman, 1987), who encounter the historic space as embodied, individual learners (Csikszentmihalyi & Robinson, 2009;Dawson, 2014;Winans & Dorman, 2016) with their own entrance narratives and subjectivities (Burgard & Boucher, 2016Cameron & Gatewood, 2003;Gatewood & Cameron, 2004;Doering & Pekarik, 1996;Grever, de Bruijn, & van Boxtel, 2012;Latham, 2013;Levy, 2017;Reich, Buffington, & Muth, 2015;Smith, 2006;van Boxtel, Klein, & Snoep, 2011;Winans & Dorman, 2016), but also as collaborative learners, interacting with professional peers (Hutchins, 1994: Lave & Wenger, 2018Korthagen, 2010;Zeichner, 2005), who then transfer the experience/information gathered in HSBPD to different professional roles and contexts (Clark & Paivio, 1991;Barnett & Ceci, 2002;Author, 2014;Mayer, 2009). Therefore, we positioned these studies within Complexity theory, which acknowledges that effective professional development requires "multiple and cyclic movements between the systems of influence in teachers' worlds" (Opfer & Pedder, 2011, p. 386) including continuous interaction between knowledge, identity, and participation in communities (Zellermayer & Margolin, 2005). ...