Grade 3

What space objects can have millions of times more mass than our Sun, but they remain invisible? Black holes! Their gravity is so strong that not even light can escape. In this book, you'll… Read More →

This timely introduction to checks and balances explores how the three branches of government work together. Historical context and examples illustrate the vision of our founding fathers for… Read More →

Have objects from space ever hit Earth? Yes! Every day small meteoroids crash into the atmosphere. Some burn up, but some hit the ground. Space junk also falls to Earth. Comets and asteroids… Read More →

Huddled in tense silence, a team of scientists watches a bank of flickering screens. Years of design and engineering work, tests, failures, redesigns, and successes are bound up in this… Read More →

Could there be other planets in the universe similar to those in our solar system? Yes! Scientists have discovered worlds circling distant stars. They call these objects exoplanets. In this… Read More →

Give readers an engaging look at the media and government, perfect for study ahead of the next presidential election. Historical background and modern examples of how the media and government Read More →

How can robots help us explore space? A probe called New Horizons is zooming through the outer solar system. It's headed to Pluto. It and other space robots can go where people cannot… Read More →

How long does it take to get into outer space? About nine minutes! Powerful vehicles carry people beyond Earth's atmosphere in a short time. But astronauts train for years before they go on… Read More →

What are the functions of the Executive Branch of government? Sidebars, historical information, and modern examples of the Executive Branch in action illustrate how it works. Provide readers… Read More →

What’s longer than a football field, weighs more than 450 cars, yet flies miles above Earth's surface? It’s the International Space Station. In this book, you'll learn how the station was… Read More →

The World Wide Web is also called the Internet. You can use it to find almost any kind of information. You get to the Internet through a computer. Have you found information on the Internet?… Read More →

With the latest Supreme Court Justice confirmation process making headlines, this book provides readers with a relevant and timely introduction to the Judicial Branch. Learn how decisions… Read More →

Prepare readers for the next presidential election with this engaging introduction to the Legislative Branch. Learn how the Legislative Branch enacts laws that impact your daily life through… Read More →

History books tell much about Lewis and Clark's expedition West. But what is less known is how far the explorers went to ensure their entire team had an equal voice in decision-making, even… Read More →

Provide readers with an engaging and relevant introduction to voting and elections leading into a presidential election year. Illustrate the importance of voting and how election outcomes… Read More →

El aumento de las temperaturas en todo el planeta pone en riesgo a los animales, que pierden el lugar donde viven. Pierden las fuentes de alimento y agua. Para el año 2070, hasta un tercio de Read More →

Do you love exotic quaggas or strong black rhinos? Whatever your favorite extinct or endangered animal, you’ll soon be drawing these creatures like a pro with the help of this fun book. Just… Read More →

Did you know that there are around ten quintillion insects alive at any one time? And all of these insects have some pretty extraordinary skills! Get up close and personal with these insects, Read More →

Earthquakes can destroy entire cities in mere minutes and send shock waves rippling around the world. These devastating quakes become even more deadly when followed by monster waves. Tsunamis Read More →

Some competitors are able to crawl under barbed wire for miles. Others stay awake for days at a time. Readers will learn about some of the world's most extreme endurance competitions and how… Read More →

In just a few seconds, a spark can turn a forest into a rapidly spreading inferno of intense heat and suffocating smoke. Firefighters try to control the wildfire—a battle that might last for… Read More →