Houghton Mifflin Social Studies
Across the Centuries

Lesson at a Glance
Chapter 15, Lesson 1: Origins (pp. 396-399)

The Big Idea
Framework Concept: Technology Historians believe the earliest Americans were hunter-gatherers who probably migrated to the Americas across the Bering land bridge and who learned to adapt their technology as conditions changed over time.

Lesson Outline
Use the Lesson Outline to preview the content of the lesson. You may wish to print it for your students as a guide during reading.

Check for Understanding


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