PBS
Pbs the West: Sacagawea
Part of a comprehensive site on the American West, this page explains Sacagawea's legendary role in the Lewis and Clark expedition.
PBS
Lewis and Clark: Inside the Corps: Sacagawea
An overview of the life of Sacagawea, the only woman to travel with Lewis and Clark on the great journey to the west.
Enchanted Learning
Enchanted Learning: Lewis and Clark, American Explorers
A good, brief biography of Lewis and Clark, and a good description of their explorations. Contains a printable map and a cloze (fill in the blank) activity.