Humanistic–Religious Education in Indonesian Primary Schools: A Systematic Review Protocol and Preliminary Evidence Synthesis for Joint Cooperation Schools (SPK)

Humanistic–religious education integrates spiritual values, social relationships, and character development in primary education. However, its conceptual dimensions, implementation mechanisms, and outcome evidence remain inconsistently documented, particularly in Satuan Pendidikan Kerjasama (SPK) schools. This study presents a systematic review protocol with preliminary synthesis to examine conceptualisation, implementation practices, potential best practices, and contextual conditions. The planned review covers publications from 2014 to 2026 across Scopus, Web of Science, ERIC, DOAJ, Google Scholar, and Indonesian academic sources. The preliminary corpus comprises ten studies identified through targeted searches, including qualitative case studies, quantitative and mixed-methods research, and conceptual analysis. Formal database searching, PRISMA screening, and critical appraisal remain incomplete. Preliminary patterns indicate that vertical–spiritual and horizontal–social dimensions predominate, while habituation and school culture feature prominently in implementation. Explicit curriculum mapping and family–community engagement are less consistently documented, and comparable pupil-outcome evidence remains limited. Evidence concerning SPK schools is particularly sparse, precluding definitive best-practice claims. A proposed four-layer framework may guide further synthesis of conceptual dimensions, implementation mechanisms, outcomes, and contextual conditions. These preliminary observations require verification through completion of the systematic review before supporting evidence-based recommendations.