2

Fall

4

Victoria Falls, Zimbabwe/Zambia

4

Niagara Falls

4

Sources of Energy

3

Caves of the World

4

Chip's Tips on South Africa

4

Maddy's Ohio Diary

3

Doctor

4

Maddy's South Dakota Diary

3

Rory's Favorite Season

4

Maddy's Georgia Diary

3

Meteorites, Meteoroids, and Meteors

3

Fjords of the World

3

David Livingstone

4

Landmarks of the United States

3

Valleys of the World

4

Extreme Weather

2

Halloween

4

Chip's Tips on Venezuela

2

Seasons

4

Deciduous Forest

4

Maddy's Idaho Diary

4

Chip's Tips on United States

2

Four Seasons! Deciduous Forest

2

How Seasons Occur

4

Maddy's Arkansas Diary

2

Thanksgiving Day

3

Continents of the World

4

Maddy's Alabama Diary

4

Chip's Tips on Jamaica