Indiana Social Studies 8.H.17
The Standard
Describe the causes, courses, challenges, compromises, and consequences associated with westward expansion, including the concept of Manifest Destiny.
2026 Indiana Academic Standards: K-12 Social Studies
Teacher's field guide
What This Standard Means
What Students Need to Do
- Trace how purchases, migration, war, and treaties moved U.S. borders west. Explain why settlers went, what challenges they faced, and how expansion affected Native nations and the slavery debate. Recognize Manifest Destiny as a belief used to justify expansion, not a fact.
What Mastery Looks Like
- A student can place major events in order and explain how each changed control of land. They can describe how expansion displaced Native nations and why the Compromise of 1850 did not settle the slavery debate.
Common Misconceptions
- Students may picture western land as empty or assume Native nations agreed to give it up. They may mistake Manifest Destiny for a law or think all land changed hands through peaceful settlement. Some think the Compromise of 1850 ended the slavery dispute.
How to Assess It
- Give students a blank map and ask them to mark one westward expansion event. Have them write one cause, one challenge, one agreement or law, and one consequence for Native nations.
Lesson moves
Ways to Teach It
Give pairs a blank map and event cards; have them place and date the Louisiana Purchase, Texas annexation, and Mexican Cession.
Show an 1845 Manifest Destiny editorial excerpt and ask, 'Whose land is missing from this argument?' Require one phrase as evidence.
Have pairs sort six event cards by date, then label each as a cause, challenge, compromise, or consequence.
Use a current tribal nations map to identify whose land your school occupies, then read that nation's website with students.
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