3

David Livingstone

3

Isaac Newton

3

Clayton Does The Unthinkable

4

Yellowstone National Park

4

Maddy's Washington Diary

4

Washington Monument

3

Clayton Does The Unthinkable

4

Jewels, Gemstones, and Birthstones

4

Famous Americans: George Washington

4

Stonehenge, England

4

Maddy's Washington, D.C. Diary

4

Chip's Tips on China

3

Famous Explorers

4

Chip's Tips on Zambia

2

A Gnome with a Mushroom Home

2

One Odd Yellow Fellow

4

Maddy's Illinois Diary

3

Meteorites, Meteoroids, and Meteors

4

Maddy's Idaho Diary

2

My Five Senses

2

Flint Goes to the Doctor's Office

3

Edmund Hillary

3

Archipelagos of the World

2

Mr. Clip Clop

3

Sinkholes of the World

4

Common Units and Measures

3

Cinco de Mayo

3

A Capitol Dream

4

From the American Revolution to the Civil War

1

Parts of the Body