Leading Collaborative Curriculum and Assessment through Distributed Leadership and Inclusive Practices - A Literature Review

In the evolving landscape of education, schools must respond to the growing complexity of factors, including rapid technological changes, shifting pedagogical expectations, and diverse student needs. These demands call for increasingly adaptive leadership models. Distributed leadership is a compelling approach, shifting leadership from hierarchical structures to a shared responsibility that leverages the expertise of multiple stakeholders. International schools offer a vibrant context for this, as their structural and pedagogical complexity, paired with diverse student populations, requires consistently agile and inclusive leadership. Middle leaders, in particular, are well-positioned to enact this vision by fostering collaboration in curriculum and assessment planning, as they straddle leadership while remaining firmly rooted at the chalkface. 

This review examines how middle leaders in international schools can enact distributed leadership as a foundation for collaborative practices, data-informed decision-making, inclusive pedagogy, and teacher development and well-being.

​​Distributed Leadership: A Foundational Approach in Education

Distributed leadership is characterised by collective responsibility and shared decision-making that extends beyond formal roles (Phillips et al., 2023; van Schaik et al., 2020). Hallinger and Lee (2012) distinguish between two forms: “numerical,” involving multiple leaders across roles, and “concertive,” characterised by intuitive coordination based on shared beliefs and trust. Unlike top-down models, distributed leadership empowers multiple agents, where the “collective expertise of educators” enables “a more innovative and adaptable environment that meets the diverse needs of students” (Phillips et al., 2023, p. 2083).

However, implementation is complex. Phillips et al. (2023) warn against “ambiguity in roles and responsibilities” (p. 2086), emphasising the need for clearly defined structures. Other challenges include communication breakdowns, clarity of accountability, and resistance to cultural change. Despite these barriers, distributed leadership remains foundational for middle leaders seeking to drive collaborative, inclusive, and data-informed improvement efforts.

Collaborative Curriculum and Assessment Practices

Distributed leadership enables collaborative curriculum and assessment design. Hallinger and Lee (2012) identify key strategies for aligning programmes across school levels, including the “development of subject vertical and horizontal articulation documents, teachers teaching in more than one program”, and collaboration between divisional curriculum coordinators and teachers (pp. 491-492). These mechanisms embed instructional leadership in daily practice, deepening the understanding of the school-wide vision and building shared ownership of its implementation.

Professional Learning Communities (PLCs) serve as core structures for distributed leadership, supporting the co-construction of curriculum, pedagogical reflection, and assessment design (Phillips et al., 2023). Van Schaik et al. (2020) found that leaders who model openness, protect time for collaboration, and embed learning within the school day are most successful in sustaining professional dialogue. These conditions enable middle leaders to cultivate departmental cultures of shared planning and purposeful collaboration.

Data-Informed Decision-Making

Data use is central to effective leadership, and distributed leadership enhances its implementation by involving diverse staff in the interpretation and application of data (Phillips et al., 2023). School leaders typically use three types of data: annual standardised assessments, interim benchmark assessments, and responsive classroom-level data (Lee et al., 2025). Notably, “certain data-informed leadership practices, particularly those centred around benchmark test results, are associated with higher student achievement in reading and math” (Lee et al., 2025, p. 59), as their relevance to instructional cycles allows for targeted pedagogical adjustments. However, data use must be implemented with care. Lee et al. (2025) also caution that “leaders’ emphasis on state standardized test results … has seldom translated into improved student performance” (p. 59), highlighting that data’s impact is dependent on interpretation and application. This distinction highlights the importance of moving beyond compliance to more formative and collaborative uses of assessment.. 

Effective data use also depends on trust. Schools with high levels of staff trust are more likely to engage in meaningful interpretation of data and utilise insights to inform curriculum design (Lee et al., 2025). As Phillips et al. (2023) argue, when leadership is shared and data dialogue is collective, it “enhances the depth of data analysis and interpretation, leading to more comprehensive insights into student performance and more informed decision-making” (p. 2086). Without a clear theory of action, however, even well-intentioned data initiatives risk producing superficial changes or reinforcing the status quo (Datnow & Hubbard, 2015). To support meaningful, data-informed instructional change, middle leaders must foster a culture of trust and shared interpretation, key elements in enacting distributed leadership within their departments.

Inclusive Practices through Universal Design for Learning

Distributed leadership also fosters inclusive practices, particularly through frameworks such as Universal Design for Learning (UDL), which addresses learner variability by removing barriers to engagement, representation, and expression.

Carless (2007) critiques traditional assessment for promoting surface learning and proposes learning-oriented assessment (LOA), which emphasises “assessment tasks as learning tasks”, student involvement, and actionable feedback (p. 59). This aligns with UDL and concept-based pedagogy, where the focus shifts from grading to developing metacognitive self-evaluation skills. Rusconi and Squillaci (2023) report that UDL training improves teachers’ capacity to plan for diversity, adding that “the teacher’s mindset, and his or her knowledge of neuroscientific principles … can importantly determine the effectiveness of his or her teaching practices by making them more learner-centered” (p. 16).

While promising, the impact of UDL on teacher collaboration and reflective practice remains underexplored. Middle leaders are therefore key in embedding UDL and modelling the professional behaviours that sustain inclusive practices across teams.

Teacher Learning and Well-being

Distributed leadership supports not only curriculum and instruction but also teacher development and commitment. Effective middle leaders function as ‘integrators’, combining learning-centred vision with distributed structures to co-lead professional learning (van Schaik et al., 2020). These leaders foster collaborative environments through vulnerability and co-learning.

Beyond learning, distributed leadership influences teacher well-being. Bellibaş et al. (2024) demonstrate that both teaching and administrative workload stress reduce teacher commitment, with administrative tasks having the most significant adverse effect. By decentralising decision-making and fostering shared accountability, distributed leadership can reduce workload-related stress and enhance both psychological well-being and long-term engagement (Bellibaş et al., 2024). These benefits reinforce the potential of middle leaders to shape cultures of professional trust and shared growth.

Conclusion

The literature affirms distributed leadership as a robust framework for fostering collaboration and inclusive practice in international schools. It contributes to improved curriculum coherence, authentic assessment alignment, data-informed instruction, and teacher well-being. Models such as professional learning communities (PLCs) and Universal Design for Learning (UDL) are particularly well supported under distributed leadership, offering structured yet flexible pathways for educators to engage in meaningful dialogue and shared problem-solving (Hallinger & Lee, 2012; Phillips et al., 2023; Rusconi & Squillaci, 2023).

Despite its promise, key gaps remain. Research offers limited insight into how distributed leadership directly influences instructional shifts or student learning outcomes, particularly in diverse international contexts (Lee et al., 2025). While UDL supports inclusive planning, its influence on collaboration remains underexplored. The dynamic relationship between distributed leadership and other leadership models also warrants further attention to identify blended approaches that foster trust and build professional capacity across teams (Bellibaş et al., 2024). Carless’ (2007) LOA model provides a valuable illustration of how assessment can serve both instructional and leadership purposes. Embedding its principles into department-level leadership structures could enable more coherent, student-responsive assessment cultures, particularly in concept-based, international settings where learner diversity and equity are priorities. 

Leadership research in international schools remains underdeveloped and requires more systematic inquiry as the sector continues to grow globally (Hallinger & Lee, 2012). For senior leaders in global, concept-based schools, these findings underscore the urgent need for practical frameworks that empower middle leaders to lead collaboratively and responsively. By embedding data use and inclusive pedagogy within distributed structures, schools can shift from teacher-directed planning to learner-responsive design, thereby strengthening both educational equity and instructional impact.

References

Bellibaş, M. Ş., Gümüş, S., & Chen, J. (2024). The impact of distributed leadership on teacher commitment: The mediation role of teacher workload stress and teacher well-being. British Educational Research Journal, 50, 814–836.

Datnow, A., & Hubbard, L. (2015). Teachers’ use of assessment data to inform instruction: Lessons from the past and prospects for the future. Teachers College Record, 117(040302), 1–26.

Hallinger, P., & Lee, M. (2012). A global study of the practice and impact of distributed instructional leadership in International Baccalaureate (IB) schools. Leadership and Policy in Schools, 11(4), 477–495. https://doi.org/10.1080/15700763.2012.700990

Lee, C., Camburn, E. M., & Sebastian, J. (2025). School context, school leaders’ data-informed decision making, and student achievement: Evidence from Florida. School Effectiveness and School Improvement, 36(1), 45–70. 

Phillips, D. R., Stewart-Fox, T., Phillips, S., Griffith, M., & Bhojedat, J. (2023). Distributed leadership in education: A systematic review of its role in fostering innovative practices and enhancing school performance. International Journal of Science and Research, 12(11), 60–73.

Rusconi, L., & Squillaci, M. (2023). Effects of a Universal Design for Learning (UDL) training course on the development of teachers’ competences: A systematic review. Education Sciences, 13(5), 466. https://doi.org/10.3390/educsci13050466

van Schaik, P., Volman, M., Admiraal, W., & Schenke, W. (2020). Fostering collaborative teacher learning: A typology of school leadership. European Journal of Education, 55(2), 217–232.

Written as part of the pre-research for my Doctor in Education: Curriculum Studies and Learning Science