Why the U.S. Entered World War I

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Objective

I can explain how unrestricted submarine warfare, the Zimmerman Telegram, the defense of democracy, and economic motivations led to American entry into World War I.

Part 1 of 3

Warm-up video

CrashCourse · 9:10Vetted channel

We don't generate video — this one is by CrashCourse on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

Part 2 of 3

Practice

10 questions

1

How did Germany's policy of unrestricted submarine warfare affect American public opinion regarding involvement in World War I?

2

Explain the main message of the Zimmerman Telegram and why it was significant in shifting U.S. foreign policy towards Germany.

Part 3 of 3

Exit ticket

Quick comprehension check

Describe the series of declarations of war between European powers that occurred in late July and early August of 1914, following the assassination of Archduke Franz Ferdinand.

Sample answer included in the free materials

Get the materials

Teacher guide, student handout, and slides — free, in Google Docs format

  • Teacher Guide

    Complete lesson plan with answer keys and alternate activities

  • Student Handout

    Printable worksheet

  • Slides

    Ready to present

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