National History Day Resources

Primary Source Sets—sets of primary sources on specifc topics

http://loc.gov/programs/teachers/classroom-materials/primary-source-sets/

Free to Use and Reuse—themed content that is in the public domain 

http://loc.gov/free-to-use/

Topics Guides in Chronicling America—expert guides to certain topics in historical newspapers 

http://guides.loc.gov/newspapers-periodicals

Today in History

https://loc.gov/collections/today-in-history/about-this-collection