3

John Cabot

3

John Smith

3

Daniel Boone

4

Yellowstone National Park

4

Maddy's Maine Diary

3

Famous Explorers

4

Grand Canyon

4

Maddy's Massachusetts Diary

4

Maddy's Michigan Diary

4

Charles Bridge, Czech Republic

4

Maddy's Washington, D.C. Diary

4

Early North American Settlers

4

Maddy's North Carolina Diary

4

Maddy's Colorado Diary

3

Space Exploration

1

Jan and Jim

4

America in the 20th Century

4

Maddy's Florida Diary

4

Chip's Tips on Papua New Guinea

4

Buckingham Palace, London

3

Astronauts

4

Belém Tower, Portugal

4

The American Revolution

4

Chip's Tips on Botswana

4

Maddy's Oregon Diary

4

Maddy's Texas Diary

4

Maddy's Tennessee Diary

4

After the American Civil War

4

The Space Needle

3

Vasco da Gama