Below is a list of links designed to help students, teachers, parents, administrators, and visitors in a variety of ways. Note that NHD does not maintain or necessarily endorse any of these sites, and is not responsible for their content. Every effort is made to ensure this list is current; some sites, however, may be temporarily down or go out of service unexpectedly.
****Please remember to ALWAYS EVALUATE a web site as you would any other source of information. 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. ****
NHD appreciates your help in keeping our research links up to date. If you encounter a broken link, please email NHD and tell us the name of the link and the page that it is on.