Shmoop
Online learning and teaching resource for high school and college levels. Focuses on literature, US history, poetry, and essay writing.
www.shmoop.com
Creating Online Materials for Teaching United States History
Archival images of letters, pamphlets, drawings, and other documents from the late 19th and early 20th century. Includes a link to sample teaching projects created using these documents.
etext.lib.virginia.edu/history/histsem.html