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This research investigated whether structuring an inquiry-oriented professional learning network to include school-based co-teaching partners would amplify educators' success in taking up and adapting evidence-based understandings and practices as meaningful in their contexts. Our research questions were: (1) What conditions did educators identify in the PLN overall that supported their co-construction of knowledge and practice development together? and (2) How did including co-teaching partners in the PLN help participants to mobilize knowledge and/or practices in the contexts where they were working?

A qualitative case study design was used because of its potential to examine how and why questions about complex processes as situated in context (Butler, 2011; Yin, 2014). A case study methodology allowed us to collect and coordinate multiple forms of evidence (i.e. interviews, teacher reflective writing, classroom artifacts, field notes) to examine both how conditions created within the PLN supported learning and how co-teaching partners were mobilizing what they were learning in their school contexts. Interviews were transcribed verbatim and data was analyzed abductively through an iterative and recursive process (Braun et al., 2018).

Conditions within the PLN overall that participants identified as supportive to their knowledge mobilization and practice development included: having a shared focus, feeling accountability to the group, collaborative enactment of practices within the PLN, large group sharing and debriefing, sustained cycles of collaborative inquiry, affective support, valuing diversity and drawing from expert others as resources. Participants also identified the benefits that accrued specifically from working with co-teaching partners. In addition, findings showed how the degree to which partners engaged in rich forms of collaborative inquiry could be related to their learning and situated practice development.

Findings show the generative potential of inviting co-teaching partners into a PLN to engage in collaborative inquiry with others. PLNs offer the benefit of engaging with educators from outside of one's practice context, which enables pushing their thinking in new directions. Our findings add to the literature by revealing how in situ knowledge mobilization can be amplified when educators participating within a PLN are also working through cycles of inquiry with a co-teaching partner. Overall, this study offers a PLN model where teachers have built-in support for knowledge co-creation and mobilization both within and outside of their school contexts.

The emergence of networks within education has been driven by a number of factors, including: the complex nature of the issues facing education, which are typically too great for single schools to tackle by themselves; changes to educational governance structures, which involve the hollowing out of the middle tier and the introduction of new approaches with an individualized focus; in addition is the increased emphasis on education systems that are “self-improving and school-led”. Within this context, the realization of teacher and school improvement actively emerges from establishing cultures of enquiry and learning, both within and across schools. Since not every teacher in a school can collaboratively learn with every other teacher in a network, the most efficient formation of networks will comprise small numbers of teachers learning on behalf of others.

Within this context, Professional Learning Networks (PLNs) are defined as any group who engage in collaborative learning with others outside of their everyday community of practice; with the ultimate aim of PLN activity being to improve outcomes for children. Research suggests that the use of PLNs can be effective in supporting school improvement. In addition, PLNs are an effective way to enable schools to collaborate to improve educational provision in disadvantaged areas. Nonetheless harnessing the benefits of PLNs is not without challenge. In response, this paper explores the notion of PLNs in detail; it also sheds light on the key factors and conditions that need to be present if PLNs are to lead to sustained improvements in teaching and learning. In particular, the paper explores the role of school leaders in creating meaningful two-way links between PLNs and their schools, in order to ensure that both teachers and students benefit from the collaborative learning activity that PLNs foster. The paper concludes by suggesting possible future research in this area.