3

John Cabot

3

John Smith

4

After the American Civil War

4

Yellowstone National Park

3

Astronauts

4

Things to Do in Central Park

4

Maddy's Texas Diary

4

Chip's Tips on Papua New Guinea

4

Buckingham Palace, London

4

Maddy's Michigan Diary

4

Maddy's Massachusetts Diary

1

Jan and Jim

4

Maddy's Maryland Diary

4

America in the 20th Century

3

Edmund Hillary

4

The Tower Bridge, London

4

Maddy's Tennessee Diary

3

Famous Explorers

4

Maddy's Oregon Diary

4

Maddy's Maine Diary

4

Maddy's North Carolina Diary

4

Chip's Tips on Canada

4

Maddy's Virginia Diary

3

Daniel Boone

4

Gorillas and Other Primates

4

Grand Canyon

3

Vasco da Gama

4

Chip's Tips on Botswana

4

The Space Needle

4

Charles Bridge, Czech Republic