Grade 4

Did you know that there's a dragon-shaped bridge that breathes fire? Have you heard of the bridge built over ice? Or that some bridges from thousands of years ago are still standing today?… More →

When explorer Ernest Shackleton's ship got stuck in Antarctic ice, he and his crew found themselves stranded and fighting for their lives in a freezing, faraway place. Explore the exciting… More →

Peril may be anywhere in the animal world, especially for prey trying to avoid fierce predators. Learn about some of the most brutal birds, attacking from sky, ground, and water. This… More →

When faced with an enemy, the opossum flops over and doesn't move. Drool bubbles from its nose, and a smelly liquid might squirt out from its butt. Did it die of fright? No, it's playing… More →

Have you heard of houses built to look like flying saucers? And did you know the first skyscraper ever built was in Chicago? But that certainly wasn't the first big building--it came after… More →

Before the Titanic set sail, a crew of more than 15,000 workers built the magnificent ship. Follow along on this narrative nonfiction adventure telling the story of the workers who… More →

Can animals really survive in a world where temperatures drop to less than - 58°F (- 50 °C)? Children are about to discover the answer as they enter one of the coldest places on Earth--the… More →

In this book, readers will learn about the unique and defining features of Bulgaria. Vibrant, full-color photos and carefully leveled text will engage young readers as they learn more about… More →

Bullet trains originated in Japan. They are the fastest trains on Earth. Young readers will learn about the history of bullet trains, the technology that makes their high speeds possible, and More →

A turtle slowly paddles along the Amazon River. Suddenly, something from beneath the water bumps the turtle. The little reptile tries to swim faster. Then another bump--and, suddenly, the… More →

A sneaky hunter swims through murky waters where other fish can't see it coming. Then, the bull shark bumps its head against its prey before taking a huge bite. With the strongest bite of all More →

In this book, early fluent readers will learn why Burmese pythons are considered an invasive species, how they have established themselves in and impacted new ecosystems, and what scientists… More →