Research is the heart of an excellent National History Day project. The primary and secondary sources are what you use to make your case and tell the story.
Your research will take place in two parts: initial research, and advanced research. Initial research is done over the summer to help you find a potential topic and learn about how that topic could relate to the theme. Once you've decided on a topic and group or individual format, you will continue on with continued research to dive deeper into your topic and become an expert.
When all is said and done, a project should have a minimum of 15 sources, and an excellent NHD project will have roughly 20-25 sources in total. Remember that visuals, media, and interviews are also sources in addition to print and web.
You must take notes of your research as you go along and keep track of your sources.
Here are a few additional resources to help you conduct your research:
A two-page guide from NHD with advice on how to select a topic
More advice from NHD on how to conduct research and create a project
Formatting guidelines for Chicago style citation and bibliography
Formatting guidelines for MLA style citation and bibliography
Resources for general research and finding sources:
(Pro tip: Go to 'Gale' and then Academic OneFile on the PPS library sites to find academic journal articles for your required "print" source)
Boston Public Library - Online Database (sign up for a e-card)
Library of Congress - Loads of primary sources about US History topics
Internet Modern World History Sourcebook - Primary sources for world history topics
NHD's page of resources for conducting research
Resources for Plymouth history:
Massachusetts Historical Societies, Museums, and Historic Sites
(Compiled by MA History Day)