Oklahoma Social Studies 8.C.6.3.A
The Standard
- 8.C.6
- Analyze the political, constitutional, and geographic changes that occurred during the Jeffersonian Era.
- 8.C.6.3
- Examine the policies of President Thomas Jefferson by describing significant decisions to
promote a western expansionist policy through the acquisition of the Louisiana Territory and authorization of the Lewis and Clark Corps of Discovery Expedition.
Oklahoma Academic Standards for Social Studies (2026) · 8.C.6.3
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students explain why Jefferson bought the Louisiana Territory from France and sent Lewis and Clark west. They locate the territory, the Mississippi River, and the expedition route on a map. They describe how these actions expanded U.S. claims on land where Native nations already lived.
What Mastery Looks Like
- A student can connect access to New Orleans and Mississippi River trade to the purchase. They can explain how the expedition gathered information about western routes and met Native nations.
Common Misconceptions
- Students may think Lewis and Clark bought the land or explored land where no one lived. They may assume the purchase gave the U.S. immediate control over Native nations living there.
How to Assess It
- Show a map marking New Orleans, the purchased territory, and the expedition route. Ask students to explain why Jefferson bought the land and how the expedition supported his plans.
Lesson moves
Ways to Teach It
Give pairs a reference map and a blank map; have them shade the purchased territory and trace the expedition route.
Ask: How could the U.S. buy land where Native nations already lived? Have students write two sentences using a map.
Use cards labeled Mississippi shipping, New Orleans access, route maps, and plant samples; teams sort purchase motives from expedition tasks.
On a current map, trace a shipment from St. Louis to New Orleans and explain why river access mattered to farmers in 1803.
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Related Standards
- 5.C.7.3.B
geographic and scientific knowledge gained from the Meriwether Lewis and William Clark expedition
- 5.C.7.3.C
efforts to enter and maintain treaties with American Indian Nations.
- 4.C.3.2
Summarize the goals and consequences of European expeditions of North America.
- 5.C.7.3.A
the purchase of Louisiana Territory and its effect on westward expansion
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