PBS
Pbs Teachers: The Great War (World War I Lesson Plans)
Eight lesson plans for exploring aspects of World War I, also known as the Great War, with instructions for introducing middle-school learners to the causes of the conflict; to the great symbol of the war's stalemate--the trenches; to...
Khan Academy
Khan Academy: Ap Us History: 1890 1945: The United States in World War I
Discusses what triggered World War I, why the United States joined the war, and the impact the war had on life in the United States. Includes questions for students at end.