This study reinterprets a year-long Lesson Study dataset to examine how instructional vision is collaboratively co-constructed. Using a retrospective conjecture map and an operational matrix that links elements, mechanisms, and indicators, the theory of change is made explicit for tracing vision management across cycles.
A qualitative secondary analysis of an existing corpus (lesson plans, observation notes, videos, artefacts) from a one-year Lesson Study in a Japanese elementary classroom. The analysis preserves the original coding pipeline and aligns data excerpts with E/M/I identifiers.
Across four phases, collaborative construction and inclusive epistemic expectations primarily supported equitable talk moves (I1/I2); flexible adaptability enabled the relaxation of time-bounded rules (I2/I4); and role-switching routines widened entry points (I3). Mechanisms overlap and reconfigure rather than progress linearly, forming a mechanism-centred process model of teacher learning and vision evolution.
A single-site, single-teacher case based on retrospective analysis provides existence-proof support for several observed links among elements, mechanisms, and indicators, while leaving others provisional for future testing. Findings are framed for analytic rather than statistical generalisation.
The contribution is procedure-level: teams can adapt routines (co-authored norms, paraphrasing before adding, time-bounded relaxations, rotated roles, and public criteria discussion) within local constraints to address the exact mechanisms and indicators. These serve as resources for co-design, not programme prescriptions.
Making mechanisms for equitable participation visible and discussable can support inclusive classroom cultures through collaborative inquiry, without assuming uniform effects across sites.
The paper integrates Utopian Pedagogy with Lesson Study to offer a mechanism-centred, traceable account of instructional vision management.
