Links are provided to National History Day programs and to organizations and institutions which may be of interest to History Day participants both nationally and by state. Note that NHD does not maintain or necessarily endorse any of these sites and is not responsible for their content.
Some links provide access to online primary sources.
However, only a tiny fraction of possible primary sources are available on the Internet. Most of the links help you find libraries, archives, historical societies, and other institutions where you can pursue your research. While every effort has been made to ensure that these are reliable sites, you should always test sites for yourself, especially if you are using them as sources for your research. Check out Robert Harris's article, Evaluating Internet Research Sources.