3

Neil Armstrong

4

America in the 20th Century

3

The Moon

2

Washing and Bathing

4

Maddy's Mississippi Diary

2

The Wonders of the Human Body

3

Space Exploration

3

Famous Explorers

3

Body Systems

3

All About History

4

Chip's Tips on United States

4

Maddy's Louisiana Diary

3

Astronauts

4

Maddy's Connecticut Diary

4

Early North American Settlers