The Hudson River Valley Heritage website provides a comprehensive digital collection of materials relating to both sides of the Hudson River as well as both the Wallkill and Rondout Valley sides of the Shawangunk Ridge.
Maps, photographs, artwork, primary documents, historical newspapers, interviews, and diaries—and more—that are displayed on this important site all contribute in telling the story of the places, people, and events in the region over time.
http://www.hrvh.org/
At this site, one may browse, use keywords, search geographically, and view the collections at contributing institutions.
Lesson plans are available that teachers may use to help students understand many topics including Transportation, the D&H Canal, among other topics dealing with the Hudson Valley.
http://senylrc.beta.libguides.com/teaching_the_Hudson_Valley
One detailed study guide supports an online exhibit The Missing Chapter: Untold Stories of the African American Presence in the Mid-Hudson Valley.
http://www.hrvh.org/exhibit/aa07/education/