Mapping the Unknown: The Lewis and Clark Expedition and the Changing West

Day 1: Why Explore? Motives, Maps, and First Encounters

Lesson Focus: Students learn who Lewis and Clark were, why Jefferson commissioned the expedition, and how early Native nations reacted to U.S. explorers.

Do Now

• Distribute the Guided Notes and have the following prompt posted for student response:
  • "Imagine the President of the United States tells you to explore a place no one in your group has seen. You will be gone for almost 2 years. You cannot buy anything once you leave. What 5 things would you pack, and why?"
• Students complete Part A of the Guided Notes
• Call on 3-4 students to share. Circle any answers that match what Lewis actually took (tools, medicine, gifts, maps).

Transition:

Briefly introduce Lewis and Clark as Jefferson's explorers tasked with mapping the Louisiana Purchase and building relationships with Native nations. Students will fill in key terms on their notes in Part B (Background) to establish context before watching the first video.

Video Part 1 — Lewis and Clark Expedition Part 1, Introduction

• Play History in a Nutshell: Lewis and Clark Expedition, Part 1.
• Students complete Part C of the Guided Notes as they identify expedition goals and government directions.
• Pause midway to clarify terms (expedition, territory, Corps of Discovery).
• Discuss:
  • "Why did Jefferson want this journey?"
  • "How did the government support it?"
• Confirm answers as a class before moving to map work.

Mapping the Route

• Direct students to complete Part D of the Guided Notes (embedded map).
• As a class, trace the route of the Corps of Discovery from St. Louis to the Pacific Ocean, labeling the Missouri River, Rocky Mountains, and key landmarks.
• Introduce the color-coding system:
  • Yellow = Challenge or problem
  • green = Help or ally
  • blue = Discovery or change.
• Students will add color-coded notes to their maps throughout the lesson as they watch each video.

Video Part 2: "The Journey Begins"

• Play History in a Nutshell: Lewis and Clark Expedition, Part 2.
• Students complete Part E or their Guide Notes, recording how different Native nations reacted to the expedition.
• Add new color-coded notes to their maps to show friendly encounters or conflicts.
• Discuss:
  • "What helped build trust?"
  • "What caused tension?"
• Confirm answers as a class before moving on to the Exit Ticket.

Exit Ticket

• Display the following prompt:
  • One reason the U.S. sent Lewis and Clark was ___________.
  • One reaction from a Native nation was ___________, and it caused ___________.
• Collect responses to identify misconceptions and form reteach or enrichment groups for Day 2.

Day 2— Crossing the Mountains: Technology, Environment, and Consequences

Lesson Focus: Students analyze how technology, geography, and human relationships shaped the expedition's success and consequences.

Review

• Revisit key motivations and reactions from Day 1.
• Address misconceptions using exit ticket data.

Video Part 3 — "Ocean in View"

• Play History in a Nutshell: Lewis and Clark Expedition, Part 3.
• Students complete Part F of their Guided Notes, recording tools, survival strategies, and environmental impacts.
• Discuss how geography influenced their choices and outcomes.

Video Part 4 — "A Heroes' Welcome"

• Play History in a Nutshell: Lewis and Clark Expedition, Part 4.
• Students finish Part F, focusing on the expedition's results and consequences.
• Lead a brief discussion comparing benefits and costs for the U.S. and Native nations.

Inquiry Stations —"Many Perspectives"

• Students rotate through four perspective stations: Jefferson, Mandan, Watkuweis, and Spanish official.
• At each station, students complete Part G of their Guided Notes and record their findings on the Route & Relationships Graphic Organizer.
• Teacher circulates, prompting students to identify how each group responded to U.S. expansion and what changed because of it. 

Closure — Class Debate: "Was the Expedition Worth the Price?"

• Students use evidence from videos, guided notes, inquiry stations and their color-coded maps to argue from an assigned role (Jefferson, Corps member, Mandan leader, Spanish official).
• Each student completes the Debate / Discussion Assignment sheet, stating a claim and supporting it with at least two pieces of evidence (one from a video, one from a station).
• Teacher facilitates and assesses discussion using the Performance Task Rubric for speaking/listening.
• After the debate, allow students to reflect:
  • "From my point of view, the Lewis and Clark Expedition was ______ because ______."

Differentiation

• Support: Sentence frames, word bank, and captioned videos
• On-Level: Standard Guided Notes and discussion participation
• Extend: Written or recorded follow-up analysis comparing the expedition to later westward expansion events

Formative: Guided Notes, color-coded map, Route & Relationships Graphic Organizer, exit tickets

Summative: Class debate and reflection