This study is framed by two fields of scholarship. First, we define informal teacher leadership, paying particular attention to what we know about teacher leadersā activities and the outcomes of their work. Second, we present concepts from Wengerās (1998) theoretical work on ācommunities of practice,ā which informs our analysis of the data and offers a helpful way to think about how informal teacher leaders are positioned to reculture their school communities.
Informal Teacher Leadership
The idea that leadership may originate from teachers seems intuitive; however, identifying and defining what constitutes teacher leadership is complicated. In their comprehensive literature review, York-Barr and Duke (2004) found that few studies provided any definition for teacher leadership. Subsequent reviews found similar results (Nguyen et al., 2020; Wenner & Campbell, 2017). For example, in their review of teacher leadership literature spanning 2003ā2017, Nguyen et al. (2020) found that, of the 150 empirical articles reviewed, only 17 defined teacher leadership, and their definitions varied. Lack of definitional clarity makes it difficult to draw comparisons across the body of work and discern possible outcomes of teacher leadership. The definitional challenge may be especially acute for informal teacher leadership enacted by teachers without formal leadership roles or titles.
The definitions that have emerged in the literature differ in their attention to formal roles or informal teacher leadership enactment. Perhaps the most widely cited definition comes from York-Barr and Duke (2004):
We suggest that teacher leadership is the process by which teachers, individually or collectively, influence their colleagues, principals, and other members of school communities to improve teaching and learning practices with the aim of increased student learning and achievement. Such leadership work involves three intentional development foci: individual development, collaboration or team development, and organizational development.
(p. 288)
This conception views leadership as a process of influence, rather than a role, aimed at improving student learning, and begins to operationalize the process by identifying development foci ranging from individuals to organizations.
Other scholars have defined teacher leadership in relationship to teachersā dual connections to classroom teaching and leadership. Wenner and Campbellās (2017) definition includes āteachers who maintain Kā12 classroom-based teaching responsibilities, while also taking on leadership responsibilities outside of the classroomā (p. 140). Wenner and Campbell explain that a classroom teacher distinction is important because classroom teachers are uniquely positioned in their peer status to understand the complexities of teaching and influence their colleagues, a stance held by other scholars as well (Curtis, 2013; Donaldson, 2007; Mangin & Stoelinga, 2008; Muijs & Harris, 2006). Margolis (2012) makes a similar argument for classroom connections in his definition of a hybrid teacher leader as āa teacher whose official schedule includes both teaching Kā12 students and leading teachers in some capacityā (p. 292). Efforts to limit the definition of teacher leader to teachers who retain Kā12 teaching responsibilities help to draw more precise lines across the literature without precluding the possible formalization of teacher leadership roles.
A different approach to defining teacher leadership focuses on the kinds of activities that typify teacher leadership. In a seminal exploratory study of three teacher leaders, Silva et al. (2000) describe a āthird waveā of teacher leadership characterized by teachersā meaningful participation in school decision making. They explain third wave teacher leadersā key activities as (1) navigating school structures, (2) nurturing relationships, (3) encouraging professional growth, (4) helping others with change, and (5) challenging the status quo by raising childrenās voices. Distinct from the first two waves, which formalized leadership roles for teachers and diverted their instructional knowledge to educational settings outside the classroom, this third wave empowers teachers who work from within classrooms to create change. As such, Silva et al. (2000) present āa definition of teacher leadership that makes leadership a part of the work a classroom teacher does on behalf of childrenā (p. 781).
A larger study by Fairman and Mackenzie (2014) explored the teacher leadership activities of 40 teachers in seven schools. The findings showed that teacher leaders worked to increase student learning through a variety of leadership activities, including modeling professional attitudes, coaching colleagues in their use of new materials, collaborating in planning and co-creating instructional materials, and advocating for change in practices. They worked diligently to cultivate collegial environments and deepen relationships, understanding that these relationships served as the foundation for modeling and coaching activities.
A conceptualization of teacher leadership as a process of influence (York-Barr & Duke, 2004) points to the need for research on the ways in which teacher leaders are influential. Previous literature reviews have identified four main impact areas: on teacher leaders themselves and their colleagues (Nguyen et al., 2020; Wenner & Campbell, 2017; York-Barr & Duke, 2004) and on students and the school (Nguyen et al., 2020). Furthermore, the teacher leadership activities described by Fairman and Mackenzie (2014) and Silva et al. (2000) seem to reflect the kind of participatory leadership that Fullan (1995) identified as a key component of reculturing of schools. Schools are commonly characterized by social norms that perpetuate isolation, individualism, and hierarchical decision making that limit teachersā and teacher leadersā opportunities for agency and collaboration (Mangin, 2005). How then, might teacher leadership activities influence school culture? This study examines informal teacher leadership enacted by classroom teachers to determine how teacher leadership practices might influence school culture and the profession.
Communities of Practice
In Communities of Practice: Learning, Meaning, and Identity (1998), Wenger presents a social learning theory of how people negotiate meaning within communities of practice. Wenger proposes that competent membership in a community of practice includes mutual engagement, joint enterprise, and shared repertoire of practice. The membersā participation, through direct engagement in social activities and the creation of artifacts such as tools and documents, facilitates the negotiation of meaning and the reification of shared understandings. Boundary encounters, instances when members of different communities interact, allow for new connections and meaning making.
Through this āCommunities of Practiceā framework, the informal teacher leaders can be understood as working within and across communities of practice to negotiate meaning and, potentially, shift the status quo. Their membership might include professional organizations, learning communities, accreditation programs, or leadership teams. Wenger explains that if members have an experience that falls outside the current regime of competence of a community to which they belong, introducing the new experience to their community might shift its regime of competence. Wenger writes, āIf they have enough legitimacy as members to be successful, they will have changed the regime of competenceāand created new knowledge in the processā (p. 139). Thus understood, the informal teacher leadersā multimembership in different communities of practice may facilitate boundary spanning and shift regimes of competence in ways that reculture their school and even the profession.