4
Hoover Dam
4
Chip's Tips on Botswana
4
Chip's Tips on Thailand
4
Early North American Settlers
4
Maddy's Nevada Diary
4
The American Revolution
3
Harbors of the World
3
Houses from around the World
3
Bays of the World
4
Chip's Tips on Nigeria
3
Construction Worker
4
Chip's Tips on Ghana
3
Rivers of the World
3
Edmund Hillary
4
Maddy's Washington, D.C. Diary
2
Baa Baa Black Sheep
4
Maddy's Massachusetts Diary
3
Anne Frank
4
The Australian Aboriginal People
4
Landmarks of the United States
3
Nyaminyami The Spirit of the River God
4
Chip's Tips on Oman
4
Chip's Tips on Brazil
4
Chip's Tips on Venezuela
4
Temples of Abu Simbel, Egypt
2
US Landmarks
3
Energy
3
Isthmuses of the World
4
Sources of Energy
4
Hurricanes