3

John Cabot

3

John Smith

4

Maddy's Massachusetts Diary

4

America in the 20th Century

4

After the American Civil War

3

Vasco da Gama

4

The Tower Bridge, London

4

Maddy's Michigan Diary

4

Chip's Tips on Botswana

4

The American Revolution

4

Maddy's Texas Diary

4

Gorillas and Other Primates

4

Things to Do in Central Park

4

Maddy's Washington, D.C. Diary

4

Maddy's Colorado Diary

4

Maddy's Florida Diary

4

Yellowstone National Park

4

Chip's Tips on Canada

4

Charles Bridge, Czech Republic

4

Buckingham Palace, London

4

The Space Needle

4

Maddy's Maine Diary

1

Jan and Jim

3

Daniel Boone

3

Astronauts

4

Maddy's Maryland Diary

4

Maddy's Oregon Diary

4

Grand Canyon

4

Belém Tower, Portugal

4

Maddy's Tennessee Diary