4

The Plains Indians People

3

Coastal Plains of the World

2

Treeless Plains! Steppe

2

Zhen Learns About Inflation

2

Landforms

4

Indigenous People

4

Serengeti, Tanzania

4

Steppe

4

Ngorongoro Crater, Tanzania

4

Maddy's North Dakota Diary

4

Chip's Tips on Canada

4

Mount Rushmore

3

Amazing Earth - Part 1

3

Genghis Khan

4

Maddy's Oklahoma Diary

4

Maddy's Kansas Diary

3

Venus

4

Chip's Tips on Nigeria

4

Maddy's Texas Diary

4

Chip's Tips on Yemen

4

Maddy's Indiana Diary

4

Maddy's Missouri Diary

4

Maddy's Nebraska Diary

4

Maddy's South Dakota Diary

4

Maddy's Colorado Diary

4

Maddy's Wyoming Diary

3

Amazing Earth - Part 2

4

Chip's Tips on Laos

4

Early Native Americans

4

Chip's Tips on Venezuela