4

Earthquakes

4

Extreme Earth

3

Amazing Earth - Part 1

3

The Earth

3

Amazing Earth - Part 2

4

Volcanoes

4

The Golden Gate Bridge

3

Magnetism

2

Ecosystems

3

Pollution

3

Continents of the World

3

Archipelagos of the World

3

Oceans and Seas of the World

3

Wetlands of the World

3

Space Exploration

3

Color Shades

1

Animals and their homes

4

Maddy's Ohio Diary

4

Forbidden City, China

3

Solar System

3

Stars

3

Lunar Eclipse

3

Neptune

3

Lakes of the World

2

Evergreen Forests! Taiga

3

Canyons of the World

3

Amerigo Vespucci

4

Tropical Rainforest

2

Water Everywhere! Aquatic

3

Islands of the World