Grade 6 - 9

The past has always shaped the present. Ace U.S. history curriculum with an easy-to-understand breakdown of important historical events presented using carefully leveled text and… More →

Can we meet today's energy challenges with clean, cheap, renewable sources of energy? Yes! And one of the solutions is right under our feet. Using Earth's Underground Heat uses clear, simple… More →

The Utahraptor is the official state dinosaur of Utah! This ferocious predator stomped across the earth during the Cretaceous Period. Readers of this high-interest text will learn all about… More →

Throughout time, scientists have made vaccines to prevent deadly illnesses. Even today, scientists are still studying diseases and working to make new and better vaccines. Explore how… More →

Vaccines have been used for more than 1,000 years! The first vaccine was made to protect people against smallpox. Today, vaccines help protect people from many diseases and illnesses. This… More →

Deep valleys and gorges cut across landscapes around the world. But how do they form? And how have we learned to harness power from the deep splits in the ground? Explore more about these… More →

Vampire bats are the world's smallest bats! They live off the blood of prey. Elf owls might be tiny, but they can snatch prey out of midair with their talons. In this book, these animals… More →

Everything on Earth goes through a life cycle. It's normal that we're born, grow older, and eventually die. But what about the paranormal? It's time to explore what the terrifying, and… More →

When Hurricane Katrina raced toward the Gulf of Mexico, the animals at the Oceanarium in Gulfport, Mississippi stood in the path of one of nature's most vicious storms. Soon, the aquarium's… More →

From bicycles to hovercrafts, traffic lights to drones, technology has changed everything. Learn how vehicle and transportation technology makes traveling easier with detailed graphics and… More →

The velociraptor was a fierce predator. Though it stood less than 2 feet tall, it was capable of taking down much larger prey. But how did it hunt? What did it eat? This fascinating text… More →

Venezuela is a land of striking beauty. Angel Falls, the highest waterfall in the world, plunges more than 3,000 feet in the Guiana Highlands. Lake Maracaibo, the largest lake in South… More →