This document provides an introduction and overview of tagging online educational resources using the Learning Resource Metadata Initiative (LRMI). It discusses how LRMI tagging helps educators effectively search for and find relevant resources by applying common metadata standards. The document outlines the LRMI tagging process and provides an example of how to tag a video resource with metadata including topic, intended users, alignment to educational standards, and other attributes to enable targeted searches. It also discusses how LRMI tagging can be calibrated through group collaboration and examples.