4

Chip's Tips on Equatorial Guinea

4

U.S.S. Arizona Memorial at Pearl Harbor

4

The Pygmy People

4

Savanna

4

Maddy's Missouri Diary

3

Mars

4

Chip's Tips on Qatar

4

Maddy's North Carolina Diary

4

Tropical Rainforest

4

Mount Rushmore

3

Mercury

4

Famous Americans: Thomas Jefferson

2

Four Seasons! Deciduous Forest

3

Venus

4

Chip's Tips on United States

4

Deciduous Forest

3

Martin Luther King, Jr.

4

Forbidden City, China

4

Taiga

4

Chip's Tips on Yemen

4

Father's Road Trip

4

Famous Americans: Abraham Lincoln

4

Montane Forest

2

Warm Grasslands! Savanna

4

Steppe

3

Friction

2

Country Flags of Africa

3

All About History

4

Father's Road Trip

4

Washington Monument