 Greetings from the National Archives and congratulations to this year's National History Day participants and winners. Every year, student researchers find new and innovative ways to incorporate National Archives holdings in their National History Day projects. The National Archives holds over 16 billion records. These primary sources are preserved and protected to help us all understand and explore the stories of our nation, engage with the processes of the government, and lend our voices to causes in which we believe. This year's National History Day theme is Frontiers in History – People, Places, Ideas. It is a perfect theme in which to use records from your National Archives. There are several ways to locate documents and search online with the National Archives. Docs Teach is an online tool for teaching with documents. To learn more about National History Day research, visit docsteach.org.