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 →

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 →

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 →

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 →

Most people have used money online, whether it's buying something from a website or checking their bank account. But some people have gone a step further, using a type of money that exists… More →

Polar ice is melting, baking blacktop is splitting streets in scorching record highs, and the mercury keeps rising. What on Earth is causing this warming planet? As Earth's climate is… More →

The War on Terror was the longest war in American history. Both the War in Afghanistan and the Iraq War were major parts of the War on Terror. This hi/lo title takes a close look at the War… More →

Water supports life on Earth. Explore more about this important part of our planet with content tied to the curriculum of upper-elementary and middle school students and easy-to-understand… More →

Weather affects everyone on Earth every day. Explore more about this important aspect of life on Earth with content tied to the curriculum of upper-elementary and middle school students and… More →

Could humans really control the weather? Or does that only exist in comics? This book walks readers through the history of weather control in comics, explores everyday technologies that mimic More →

From a raccoon scampering along the water's edge to a young fish darting between tall reeds in the shallows, wetlands are teaming with life. All of the plants and animals in this watery home… More →