Free digital media from public TV broadcasters for educational use. Users can search for materials via individual state standards, Common Core State Standards, or national standards from different organizations. Website users can create online profiles in order to share the resources they have learned for a particular lesson with others.

Offering video lectures from elite universities, it allows viewers to grade the professors. Academic Earth also offers a "Playlists" feature based around themes such as "Laws of Nature," "Wars Throughout History," or "You Are What You Eat."

The "For Teachers" page highlights ready-to-use classroom materials that are aligned with state standards and take advantage of the Library's primary sources. It includes access to primary source sets around topics such as U.S. presidents; short facts or activities for class starters, such as "Today in History" and everyday science mysteries; themed lesson plans for dozens of topics; and even professional development curriculum.

This is the national online library for education and research in science, technology, engineering, and mathematics. It provides free math lessons and activities aligned with the Math Common Core Standards, as well as STEM-related blogs and other free teacher resources and lesson plan ideas. Targeted for K-12 teachers, higher-education professionals, and librarians, NSDL also provides science literary maps and iTunes multimedia files.