Amazing Facts About Sound, ed. , v.
America Enters The Industrial Revolution, ed. , v.
America's First Settlements, ed. , v.
America's Oddest Holidays, ed. , v.
Animal Adaptations, ed. , v.
Animals Alive, ed. , v.
Artists Around the World, ed. , v.
Atlantis, ed. , v.
Battle At The Alamo, ed. , v.
Building An Empire, ed. , v.
Building the Transcontinental Railroad, ed. , v.
Epic Civil War Battles, ed. , v.
Experiment Central, ed. 2, v.
Exploring Space, ed. , v.
Foods of Australia, ed. , v.
Foods of Egypt, ed. , v.
Foods of Ghana, ed. , v.
Foods of India, ed. , v.
Foods of Korea, ed. , v.
How Do Animals Communicate?, ed. , v.
How Do Animals Hunt and Feed?, ed. , v.
How Do Tornadoes Form?, ed. , v.
How Do Waves Form?, ed. , v.
How Have Animals Evolved and Adapted?, ed. , v.
I Can Prove It! Investigating Science, ed. , v.
Immigrants to America, ed. , v.
Inside Animals, ed. , v.
Inside Plants, ed. , v.
Inside the Human Body, ed. , v.
Legends, Myths, and Folktales, ed. , v.
Let's Investigate Light, ed. , v.
Money and Capital, ed. , v.
Movie Stunt Worker, ed. , v.
Pit Crew Worker, ed. , v.
Plants as Food, Fuel, and Medicine, ed. , v.
Religions Around the World, ed. , v.
Remarkable People in History, ed. , v.
Screams and Songs, ed. , v.
Secrets of Animal Life Cycles, ed. , v.
Secrets of Flight, ed. , v.
Secrets of Habitats, ed. , v.
Secrets of Heat and Cold, ed. , v.
Secrets of Light, ed. , v.
Secrets of Pollution and Conservation, ed. , v.
Sewer Inspector, ed. , v.
Slavery, ed. , v.
Smart Car, ed. , v.
Sniffs and Stinks, ed. , v.
Spanish Missions, ed. , v.
Spare Parts for People, ed. , v.
Stonehenge, ed. , v.
Storm Chaser, ed. , v.
Sustaining Earth's Energy Resources, ed. , v.
The Reconstruction Era, ed. , v.
The Science of Emotions, ed. , v.
The Shoemaker, ed. , v.
The Silversmith, ed. , v.
The Spanish In Early America, ed. , v.
Traveling the Santa Fe Trail, ed. , v.
Volt, ed. , v.
Vultures, ed. , v.
What Are Food Chains & Food Webs?, ed. , v.
What Are Habitats & Biomes?, ed. , v.
What Is Animal Behavior?, ed. , v.
What Is Animal Camouflage?, ed. , v.
What Is Citizenship?, ed. , v.
What Is a Life Cycle?, ed. , v.
What Is the Constitution?, ed. , v.
What Is the Executive Branch?, ed. , v.
What Is the Impact of Climate Change?, ed. , v.
What Is the Impact of Declining Biodiversity?, ed. , v.
What Is the Impact of Ocean Pollution?, ed. , v.
What Is the Judicial Branch?, ed. , v.
What Is the Legislative Branch?, ed. , v.
What Is the Structure of a Plant?, ed. , v.
What Is the Structure of an Animal?, ed. , v.
What Is the Water Cycle?, ed. , v.
Why Do Earthquakes Happen?, ed. , v.
Why Do Leaves Change Color?, ed. , v.
Why Does it Thunder and Lightening?, ed. , v.
World Holidays, ed. , v.
You've Got Nerve! The Secrets of the Brain and Nerves, ed. , v.
Social Science
Stonehenge, ed. , v.
Atlantis, ed. , v.