4

Niagara Falls

3

Wetlands of the World

4

Maddy's North Carolina Diary

3

Nathan the Whale

4

Maddy's Delaware Diary

2

Treeless Plains! Steppe

2

At the Farm

2

Prince Troy's Voyage

3

Sacagawea

3

Confucius

2

Giddy Up, Cowgirls!

3

Magnetism

2

Giddy Up, Cowgirls!

4

The Plains Indians People