The Learning Resource Metadata Initiative (LRMI) specification for tagging educational content has been adopted by Schema.org, the consortia formed by Microsoft Bing, Google, Yahoo! and Yandex to collect and document web microdata standards to improve search results. Anyone who publishes or curates educational content can now use LRMI markup to provide education-specific metadata about their resources with the confidence that this metadata will be recognized by major search engines.
The LRMI offers a lightweight tagging schema that standardizes the way content publishers describe the education-specific characteristics of their resources—characteristics such as intended end user, intended age range, and alignment to learning objectives such as those outlined by the Common Core State Standards (CCSS).
To view the education-specific properties proposed by the LRMI project, visit lrmi.net/the-specification.