Grade 6

Robonauts have been built to be substitutes for astronauts. They are made to look and move much like humans so they can take over time-consuming or dangerous space work. This high-interest… More →

Twenty-five times faster than the speed of sound, rockets are high-speed space delivery machines. Every week, at least one rocket launches into space from somewhere in the world! This title… More →

The natural world is made up of thousands of different kinds of rocks, gems, crystals, and fossils. They formed through a variety of geological processes, and many can be put to use. But how… 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 →

Known for his larger-than-life personality and superior boxing skills, Muhammad Ali was a heavyweight superstar! This graphic nonfiction title introduces the boxing icon through detailed… More →

Moscow's Red Square is a center of Russian history and culture. This book explores the physical and cultural geography of Russia, showing the reader what daily life is like in Russia and how… More →

Saber-toothed cats were powerful predators known for their long, sharp teeth! In this hi/lo title, reluctant readers are introduced to these ice age animals through leveled text and detailed… More →

Many fierce predators lurk just below the ocean's surface. Saltwater crocodiles use their strong jaw and huge teeth to latch on tight. But there's no escape once a hammerhead shark has pinned More →

When Mauro Prosperi set out on an ultramarathon through the desert, he didn't realize he would soon enter a race for his life. After a sandstorm sent Mauro off course, he had to do whatever… More →

When someone wants to buy something expensive, they may not have all the money right away. What do they do? They save up! Learn all about saving money. Discover why people save, different… 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 →

Brothers John and Frank Craighill knew there was a problem when they saw fewer and fewer grizzly bears at Yellowstone National Park. But how did grizzlies--with a population size once as big… More →