Lewis and Clark Expedition & Western Exploration

Active learning helps students grasp the complexity of the Lewis and Clark Expedition because it requires them to analyze primary documents, interpret maps, and engage in discussions that reveal multiple perspectives. Memorizing dates and routes won’t capture the expedition’s impact, but examining conflicting viewpoints and mapping real decisions will make the history vivid and meaningful.

• 8th Grade
• American History
• 4 activities
• 20 min–40 min

Learning Objectives

1. Explain the primary objectives President Jefferson set for the Corps of Discovery in the Louisiana Territory.
2. Analyze Sacagawea's contributions to the expedition's success, citing specific examples of her knowledge and actions.
3. Evaluate the impact of the Lewis and Clark Expedition on scientific understanding of North American flora and fauna.
4. Compare the perspectives of Corps members and Native American tribes encountered regarding the expedition's purpose and consequences.
5. Map the general route of the Corps of Discovery from St. Louis to the Pacific Ocean and back.

Timeline Challenge

⏱ 40 min·Pairs

Primary Source Analysis: Two Perspectives on the Expedition

Provide students with a journal entry from Lewis or Clark alongside a brief passage from a contemporary Native American account of first contact. Students use a structured annotation guide to identify what each source emphasizes, omits, and assumes. Pairs compare notes and draft a paragraph explaining why the same event looks different depending on the source.

Prepare & details

Explain the primary objectives of the Lewis and Clark expedition.

Facilitation Tip: For Mapping Activity, provide tracing paper over printed maps so students can layer routes without damaging original documents.

Setup: Long wall or floor space for timeline construction

Materials: Event cards with dates and descriptions, Timeline base (tape or long paper), Connection arrows/string, Debate prompt cards

• Remember
• Understand
• Analyze
• Self-Management
• Relationship Skills

Gallery Walk

⏱ 35 min·Small Groups

Gallery Walk: Expedition Discoveries

Post stations around the room: one for maps and geography, one for plant/animal specimens, one for Sacagawea's contributions, one for diplomatic encounters with Native nations, and one for the expedition's long-term legacy. Students rotate with sticky notes , adding what they know, what surprises them, and what questions they have. Debrief as a whole class.

Prepare & details

Analyze the role of Sacagawea in the success of the expedition.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Think-Pair-Share

⏱ 20 min·Pairs

Think-Pair-Share: Was the Expedition a Success?

Students independently write a quick response: success or failure, and for whom? They must name at least one group for whom the expedition's outcomes were mixed or harmful. Pairs compare, then share. Use responses to surface the idea that 'success' depends on perspective and which goals you prioritize.

Prepare & details

Evaluate the impact of the expedition on scientific knowledge and westward expansion.

Setup: Standard classroom seating; students turn to a neighbor

Materials: Discussion prompt (projected or printed), Optional: recording sheet for pairs

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Timeline Challenge

⏱ 30 min·Small Groups

Mapping Activity: Tracing the Corps of Discovery

Students trace the expedition's route on a blank map of the Louisiana Territory, marking key geographic features, winter camps, and significant encounters. Small groups then annotate the map with three 'turning points' where Sacagawea's contributions were decisive. Share maps in a brief class discussion.

Prepare & details

Explain the primary objectives of the Lewis and Clark expedition.

Setup: Long wall or floor space for timeline construction

Materials: Event cards with dates and descriptions, Timeline base (tape or long paper), Connection arrows/string, Debate prompt cards

• Remember
• Understand
• Analyze
• Self-Management
• Relationship Skills

Teaching This Topic

Teachers approach this topic by centering Native perspectives first, using the expedition’s journals as evidence of presence rather than authority. Avoid framing the journey as a heroic discovery of empty land. Instead, use activities that force students to weigh Jefferson’s goals against the daily realities of the Corps and the nations they encountered. Research shows that when students analyze primary sources critically, they better understand how power and perspective shape historical narratives.

What to Expect

In these activities, success looks like students questioning oversimplified narratives, connecting primary sources to larger historical themes, and articulating how the expedition’s goals both aligned with and conflicted with the realities Native nations faced. They should be able to explain why Sacagawea’s role mattered beyond being a ‘guide’ and why the expedition’s ‘success’ depended on whose perspective you used.

Watch Out for These Misconceptions

Common Misconception

During Primary Source Analysis: Two Perspectives on the Expedition, students may assume Sacagawea’s primary role was guiding the expedition through unfamiliar territory.

What to Teach Instead

Use the primary sources to guide students to identify Sacagawea’s documented roles as interpreter, diplomat, and cultural mediator. Have them tally specific examples from her interactions with the Corps and Native nations to correct the oversimplification.

Common Misconception

During Gallery Walk: Expedition Discoveries, students might conclude the expedition was purely a scientific and exploratory success with no negative consequences.

What to Teach Instead

Direct students to the gallery’s section on Native accounts and ecological changes, asking them to note evidence of displacement or environmental impact. Use these observations to reframe the expedition’s legacy during whole-group discussion.

Common Misconception

During Mapping Activity: Tracing the Corps of Discovery, students may assume the Louisiana Territory was empty land waiting to be mapped and settled.

What to Teach Instead

Provide pre-activity context: assign each student or group a Native nation’s territory to map before tracing the Corps’ route. Have them compare the two maps to highlight the presence of established communities.

Assessment Ideas

Exit Ticket

After Mapping Activity: Tracing the Corps of Discovery, give students a card with one of the expedition’s primary objectives. Ask them to write two sentences explaining why this objective was important to President Jefferson and one specific challenge the Corps faced in achieving it.

Discussion Prompt

During Think-Pair-Share: Was the Expedition a Success?, have students discuss the question: 'How might the expedition have been different if Sacagawea had not been part of the Corps of Discovery?' Assess their arguments based on specific examples of her role, such as her linguistic skills, knowledge of the land, and diplomatic influence.

Quick Check

After Primary Source Analysis: Two Perspectives on the Expedition, present students with a short excerpt from a Lewis and Clark journal and a brief Native perspective. Ask them to identify one piece of evidence from each source that highlights a difference in experiences or understanding of the Corps’ presence.

Extensions & Scaffolding

• Challenge early finishers to write a journal entry from the perspective of a Hidatsa or Shoshone leader responding to Lewis and Clark’s arrival.
• Scaffolding for struggling students: Provide sentence stems for Think-Pair-Share like, 'One difference between the Corps’ goals and Native nations’ experiences was...'
• Deeper exploration: Have students research and present on one Native nation’s trade networks or diplomatic practices before the expedition’s arrival to contextualize interactions.

Key Vocabulary

Corps of Discovery	The official name for the Lewis and Clark Expedition, a group of U.S. Army soldiers, led by Meriwether Lewis and William Clark, tasked with exploring the Louisiana Purchase.
Louisiana Purchase	The 1803 acquisition of a vast territory from France, doubling the size of the United States and providing access to the Missouri River and westward expansion.
Portage	The act of carrying or transporting boats and supplies overland between bodies of water, a common challenge faced by the expedition.
Diplomatic Relations	Establishing and maintaining peaceful interactions and agreements between the expedition and the various Native American nations they encountered.
Scientific Documentation	The process of recording detailed observations and collecting specimens of new plants, animals, and geological features for scientific study.