Grade 4

Take a trip from the source to the mouth of some of the world's wildest rivers! This series plots the path of each river, describing major landmarks and activity along the way. On the… More →

Have you ever wondered what creatures lurk below the river's surface? In this hi-lo series, reluctant readers will dive in to learn about the habitats, diets, behaviors, and threats of some… More →

What can clean your carpet, build a car, defuse a bomb, and explore distant planets? Robots! Kids know that robots rock, so help them build their reading skills with these nonfiction books on More →

From tiny pieces of sand on the beach to towering mountains, Earth is a pretty rockin' place. But how do rocks form, what are the made of, and how do we use this resource all around us? Take… More →

Rocks and minerals are all around us! Not only are they on the ground at our feet, but they make up objects and technologies that we use every day. From granite countertops to tiny crystals… More →

Climate change is having some serious impacts on our planet's plants, animals, and environments. But these major problems aren't without solutions. Learn about some of the incredible… More →

In these true tales of wildlife survival, readers discover how some of America's most beautiful and fascinating animals came face-to-face with the threat of extinction. Yet through the heroic More →

Places with dark and disturbing histories exist throughout the world. Some of these locations are apparently so fraught with horror that many visitors experience paranormal activity at the… More →

Do you think you know all there is to know about the United States? These expertly crafted, bone-chilling stories for beginning readers will test your knowledge! Explore the dark and… More →

Do you think you know all there is to know about the United States? These expertly crafted, bone-chilling stories for beginning readers will test your knowledge! Explore the dark and… More →

Do you think you know all there is to know about the United States? These expertly crafted, bone-chilling stories for beginning readers will test your knowledge! Explore the dark and… More →

Why are flamingos pink? How does a blue-footed booby use its blue feet? Find these answers and more about some of nature's most colorful creatures in Science Behind the Colors. Each book… More →