4

Hoover Dam

4

The American Revolution

3

Houses from around the World

4

Chip's Tips on Oman

4

Chip's Tips on Nigeria

4

Chip's Tips on Brazil

4

Landmarks of the United States

2

Baa Baa Black Sheep

4

Early North American Settlers

4

Temples of Abu Simbel, Egypt

3

Bays of the World

4

Hurricanes

3

Harbors of the World

4

Chip's Tips on Ghana

3

Energy

4

Maddy's Massachusetts Diary

4

Sources of Energy

2

US Landmarks

4

Maddy's Nevada Diary

4

The Australian Aboriginal People

3

Anne Frank

4

Chip's Tips on Venezuela

3

Edmund Hillary

3

Rivers of the World

4

Maddy's Washington, D.C. Diary

4

Chip's Tips on Botswana

2

I Spy Snails and Slugs

4

Chip's Tips on Thailand

3

Isthmuses of the World

3

Nyaminyami The Spirit of the River God