4

Chip's Tips on Madagascar

3

Gravity

4

A Valentine for Cupid

4

Maddy's Nevada Diary

2

Dinosaurs

4

Amphibians

4

Maddy's Pennsylvania Diary

3

Coastal Plains of the World

3

Saturn

1

In the Kitchen

3

Islands of the World

3

States of Matter

3

Team Sports

3

Mythical Creatures

3

Galaxies

3

The Universe

4

Chip's Tips on Russia

3

Uranus

4

Chip's Tips on Kenya

4

Maddy's Oklahoma Diary

4

Sources of Energy

3

Heat and Temperature

4

Maddy's Wyoming Diary

3

Comets

4

Chip's Tips on Chile

4

Maddy's New Mexico Diary

4

Chip's Tips on Mexico

4

Hoover Dam

3

Jupiter

4

Dr. Why-Human Body