Oklahoma Social Studies 8.C.9.2.E
The Standard
- 8.C.9
- Examine the political, economic, social, and geographic changes that occurred during the period of westward movement.
- 8.C.9.2
- Analyze the territorial growth of the United States of America and the consequences of westward expansion.
Describe the impact of westward migration on American Indian culture, homelands, Tribal sovereignty, and the growing sectional tensions regarding the expansion of slavery in new territories.
Oklahoma Academic Standards for Social Studies (2026) · 8.C.9.2
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students explain how westward migration changed American Indian homelands and cultural practices, and how federal actions limited Tribal sovereignty. They also explain why adding western territories intensified arguments between free and slave states.
What Mastery Looks Like
- A student uses a map or treaty to show where settlers entered Tribal lands and explains a specific effect on a Tribal nation. They connect the Kansas-Nebraska Act to arguments over whether slavery would spread west.
Common Misconceptions
- Students may think Tribal nations disappeared when settlers moved west, rather than continuing to govern and defend their lands. They may also assume every new territory banned slavery or that the slavery debate was the same as the fight over Tribal land.
How to Assess It
- Give students maps of the Oregon Trail and 1851 Fort Laramie treaty lands. Ask them to mark one overlap, explain one effect on a Tribal nation, and name one slavery dispute tied to western expansion.
Lesson moves
Ways to Teach It
Have students lay a printed Oregon Trail route over a map of 1851 Fort Laramie treaty lands and circle where they overlap.
Ask students to write: What did a treaty boundary promise, and why might a Tribal nation still oppose settlers crossing it?
Give pairs cards labeled treaty boundary, Tribal government, buffalo hunting, and Kansas voting; match each to a specific effect of migration.
Compare a current Oklahoma Tribal nations map with an Indian Territory map; locate Cherokee Nation and note how its homeland changed.
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Related Standards
- 8.C.2.2.C
Explain how the preservation of homelands, cultures, and trade affected the stance taken by many American Indians.
- 6.C.3.6
Describe the cultural interactions between American Indian cultures and European settlers which impacted the heritage and history of major regions of the Wester...
- USH.C.1.3
Analyze the causes and effects of the continuing westward migration and territorial growth after the Civil War.
- OKH.C.3.1
Examine the impact of the Civil War and Reconstruction Treaties on American Indian peoples, territories, and Tribal sovereignty.
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