4

Maddy's Missouri Diary

4

Maddy's Tennessee Diary

4

The Mississippi River

4

Maddy's Kentucky Diary

4

Maddy's Montana Diary

4

Maddy's Illinois Diary

3

Daniel Boone

4

Tornadoes

4

Maddy's North Dakota Diary

4

Maddy's Iowa Diary

4

Gateway Arch

3

Sacagawea

4

The Plains Indians People

2

Map of the United States of America

3

Rivers of the World

4

Maddy's South Dakota Diary

4

Maddy's Arkansas Diary

4

Maddy's Kansas Diary

4

Maddy's Nebraska Diary

3

Coastal Plains of the World

4

Maddy's Oklahoma Diary

4

Chip's Tips on Finland

3

Valleys of the World

3

Drainage Basins of the World

3

Christopher Columbus