4

Niagara Falls

2

Giddy Up, Cowgirls!

3

Confucius

4

The Plains Indians People

4

Maddy's North Carolina Diary

3

Wetlands of the World

2

Treeless Plains! Steppe

2

At the Farm

2

Prince Troy's Voyage

4

Maddy's Delaware Diary

3

Sacagawea

3

Magnetism

3

Nathan the Whale