The Library of Congress offers a daily artifact feed similar to the one offered by the National Archives. Today in History from The Library of Congress offers a new image or document along with the story of the notable event or person connected to it. The LOC generally includes more information about the featured artifact than what the National Archives includes about their daily documents.
Applications for Education
When I was teaching U.S. History I used both of the resources on a regular basis. Sometimes I'd use, with modification, the lesson plans associated with the artifacts. Most of the time I just used the featured artifacts to spark little discussions about moments in history.
A couple of weeks ago I wrote about the importance of helping students recognize the differences between primary and secondary sources. If you missed that post, you can read it here.