3

Valleys of the World

4

Grand Canyon

4

Chip's Tips on Mexico

3

Fjords of the World

4

Lake Malawi, Malawi

4

Maddy's Vermont Diary

4

Chip's Tips on The Dominican Republic

4

Chip's Tips on Zambia

2

Animal Hockey Team

4

Maddy's Idaho Diary

4

Maddy's West Virginia Diary

4

Maddy's Ohio Diary

3

Amazing Earth - Part 2

3

Canyons of the World

3

Sinkholes of the World

4

Maddy's Massachusetts Diary

4

Chip's Tips on India

4

The American Revolution

4

Maddy's Indiana Diary

3

May Day

2

Flowers

4

Maddy's North Dakota Diary

3

Venus

4

Maddy's Pennsylvania Diary

4

Maddy's Nevada Diary

4

Chip's Tips on Nigeria

4

Maddy's Maryland Diary

3

Glaciers of the World

4

Maddy's New York Diary

3

Leonardo da Vinci