4

Lightning

3

Inventors and Inventions

3

Rivers of the World

4

Maddy's Tennessee Diary

4

America in the 20th Century

2

Four Seasons! Deciduous Forest

3

Saturn

3

All About History

3

Individual Sports

2

Evergreen Forests! Taiga

4

Extreme Weather

4

Petronas Twin Towers, Malaysia

2

Carrying Together, Ants

4

Maddy's Minnesota Diary

4

Volcanoes

2

Country Flags of Asia

4

Chip's Tips on Russia

2

Little Dots, Big Help, Ladybugs

4

Famous Americans: Benjamin Franklin

3

Chinese New Year

2

The Pair in the Air, Lovebugs

4

Maddy's Connecticut Diary

4

Extreme Earth

4

Maddy's California Diary

3

Bays of the World

4

Chip's Tips on Laos

3

Gulfs of the World

4

Patsy and Paul at Angkor Wat in Cambodia

4

Maddy's Texas Diary

4

The Hmong People