4

Table Mountain, South Africa

3

Mountains of the World

2

Frozen Ground! Tundra

4

Maddy's New Jersey Diary

4

Amphibians

4

Maddy's Massachusetts Diary

4

Chip's Tips on Greece

4

Maddy's Alaska Diary

4

Chip's Tips on United States

4

Chip's Tips on South Africa

4

Maddy's Arizona Diary

4

Maddy's Louisiana Diary

4

Chip's Tips on Canada

4

Maddy's Idaho Diary

4

Maddy's Mississippi Diary

4

Maddy's Kentucky Diary

4

Maddy's Virginia Diary

4

Montane Forest

4

Chip's Tips on China

3

Valleys of the World

4

Chip's Tips on Yemen

4

Chip's Tips on Oman

4

Chip's Tips on Brazil

3

Rabindranath Tagore

3

Amazing Earth - Part 1

4

Mount Rushmore

3

Mercury

3

Amazing Earth - Part 2

4

Maddy's Colorado Diary

4

Maddy's Utah Diary