Here you'll find a fantastic resource for analyzing several primary sources regarding Thomas Jefferson's presidency, from his election and home in Monticello to the Lewis and Clark expedition and the Louisiana Purchase.

For as long as there has been life on earth, animals, including humans, have used migration as a means of survival. This collection of activities supports young scientists as they learn about this behavioral adaptation, encouraging them...

Read about what the Yankton Sioux wanted from Lewis and Clark and why they were disappointed when they met the Corps of Discovery on its journey up the Missouri River. From PBS.

Read about the Otos, a Southern Sioux tribe, and their encounter with the Corps of Discovery in the summer of 1804. From PBS.

Meet the Missouri Indians, the first group of western Indians encountered by the Corps of Discovery. Read how Lewis and Clark dealt with them. From PBS.