4

Burj Khalifa, United Arab Emirates

4

An Introduction to the History of the United States of America

4

History of the United States

4

Burj Al Arab, United Arab Emirates

2

Map of the United States of America

4

Chip's Tips on United States

4

Landmarks of the United States

3

Thanksgiving Day

3

Canyons of the World

3

Purim

3

Diwali

4

The American Civil War

4

Hoover Dam

3

Sinkholes of the World

4

Maddy's Arkansas Diary

3

Passover

3

A Capitol Dream

4

Chip's Tips on Canada

4

Maddy's Tennessee Diary

3

Sacagawea

4

Maddy's Washington Diary

4

Maddy's Illinois Diary

4

Maddy's Nebraska Diary

3

Drainage Basins of the World

4

Maddy's North Carolina Diary

4

Chip's Tips on Mexico

4

Maddy's Missouri Diary

3

Do Your Part

4

Chip's Tips on Russia

4

Maddy's Wisconsin Diary