Digital cultural heritage is increasingly available from memory institutions. However, its integration into formal education remains limited due to a lack of education-specific metadata and weak alignment with curricula. This paper addresses this gap in the Japanese context, where national curricula are centrally defined but rarely linked to digital resources. We present a Linked Open Data (LOD) infrastructure that connects curriculum standards (Course of Study), textbook units, and digital archive content through a reusable, semantically modeled framework. We contribute to implementing a scalable, curriculum-aligned metadata foundation that supports practical educational use. We describe the structure, vocabulary design, and implementation of the infrastructure, and demonstrate its utility through linked applications such as search tools and visualizations. This work lays the groundwork for connecting curricula with cultural resources, enabling more effective discovery, reuse, and integration of archival content in educational settings.