4

Maddy's Kentucky Diary

4

Maddy's Virginia Diary

3

Sinkholes of the World

3

Coastal Plains of the World

4

Maddy's Illinois Diary

4

Maddy's Ohio Diary

4

Maddy's Tennessee Diary

4

Maddy's Indiana Diary

3

Caves of the World

4

Maddy's Missouri Diary

4

Famous Americans: Abraham Lincoln

2

Map of the United States of America

3

Christopher Columbus

3

Daniel Boone

4

Maddy's West Virginia Diary

4

The Mississippi River