​National History Day's Annual Theme:
Communication in History: The Key to Understanding
Every year National History Day® frames students’ research within a historical theme. The theme is chosen for the broad application to world, national, or state history and its relevance to ancient history or to the more recent past. The 2020-21 theme is Communication in History: The Key to Understanding.
Watch the National History Day Theme Introduction Video: 

NHD Contest Rule Book

Download the NEW National History Day Contest Rule Book, effective with the beginning of the 2020-2021 contest year.
2021 Theme Book
Download the PDF Communication in History: The Key to Understanding Theme Book
Connecticut Topics
Download the 2021 List of Connecticut Topics for Communication in History.
Theme Narrative
Download the 2021 Communication in History Theme Narrative - including some topic suggestions!

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