Grade 6

A desert tortoise retreats into its shell. It is nearly impossible for predators to break through it! This hi-lo title introduces animals that have adapted to wear their protection. Readers… More →

The night stalkers are some of the most elite members of the U.S. Army. Their dangerous missions frequently take them behind enemy lines. For Michael Durant, it was during one of these… More →

In the hard-fought battles of war, a special group of soldiers handles some of the toughest missions. These elite U.S. Army Rangers played a pivotal role in Normandy, France, during the… More →

Computers can now drive cars, translate live speech, and even solve real-world problems. Some of the most cutting-edge advancements have been made thanks to artificial intelligence. But just… More →

Artificial intelligence is all around us! It's in our classrooms, hospitals, and even in the smartphones in our pockets. But how does this technology work, where did it come from, and what… More →

William Hornaday admired the American bison. He wanted every American to see the beautiful animal that was once plentiful across the Great Plains. But in 1886 he made a shocking prediction.… More →

Asiatic lions dominate the Gir Forest of India. But what would happen if a Bengal tiger encroached on their territory? In this clash of big cats, readers will learn about the secret weapons… More →

Moe Berg was not a great hitter during his Major League Baseball career. But he found success in a world beyond baseball when he became a spy for the United States during World War II. In… More →

Welcome, Agent 359. This file is full of top-secret information about asteroids and comets. Learn about what is inside these large space lumps, where they come from, and different asteroids… More →

Immerse yourself in the world of the paranormal with stories inspired by true events. Each book is ready to scare with an account of creatures and events that are truly strange--and often… More →

Everything around us is made of matter, but what is matter made of? Atoms and molecules! Learn all about how the smallest things in our universe come together to make the biggest, examine… More →

Years ago, aliens convinced humans to poison planet Earth. Learn about dangerous metals and chemicals that may be in the things you use every day. Then, discover what you can do to help save… More →