Over the past 10-15 years, educational digital libraries (DLs) have acquired online learning resources of varying levels of granularity (e.g., from images to entire lessons) and of varying sources of authorship (e.g., grant-funded subject matter experts; K12 teachers; graduate students). The challenge is to balance collecting and providing access to online learning resources while maintaining a level of resource quality that distinguishes DLs from internet search engines. In response, many educational DL builders have established review rubrics.