Teachers as facilitators and innovators in 21st-century STEM education

This integrative review examines how teachers function as facilitators and innovators in integrated science, technology, engineering, and mathematics (STEM) across early childhood, primary, and secondary schooling and identifies the conditions that enable sustained practice using Greece as an illustrative centralized context. Guided by constructivist sociocultural and communities of practice perspectives, we reviewed peer-reviewed studies and key policy and curriculum documents published from 2010 to 2025, together with earlier foundational works. Sources were coded into teacher roles and enabling conditions and synthesized narratively. We find eight recurring roles that characterize effective STEM teaching, including the shift from transmission to facilitation, the design of authentic and context-rich problems, the scaffolding of inquiry, purposeful integration of technology, cultivation of a growth mindset, sustained professional learning, a commitment to equity and inclusion, and partnership brokering with families, industry, and communities. Enabling conditions include alignment among curriculum, instruction, and assessment, protected collaboration time, and supportive leadership and policy, including rules on teacher assignment. Illustrative enactments include play-based robotics in early childhood data-rich projects in primary classrooms and interdisciplinary co-taught design challenges in secondary settings. Persistent tensions involve crowded timetables, limited moderation of common performance tasks, and technology used as an add-on. We outline system-level levers such as moderated common tasks, professional learning communities, protected time for planning, and clearer policy to practice bridges that can help translate integrated STEM from aspiration to routine classroom practice.