Grade 4

Dive into the secret history of . . . secrets! Cryptology is the art and science of secret communication, and its purpose is to protect precious information and keep people safe. Learn about… Read More →

An American Indian Library Association Youth Literature Award Honor Picture Book Mary Golda Ross designed classified airplanes and spacecraft as Lockheed Aircraft Corporation's first female… Read More →

Green Bay Packers linebacker Clay Matthews has had incredible success in just a few years in the NFL. When he was named to the 2009-2010 Pro Bowl, he became the first Packers rookie since… Read More →

Los Angeles Dodgers pitcher Clayton Kershaw has been one of Major League Baseball's (MLB) best pitchers since he joined the league in 2008. He was awarded the Cy Young Award in 2011 as the… Read More →

Why do animals need to camouflage themselves? Camouflage is a way of hiding by blending into the background. Many animals use camouflage so that they won't be caught by their enemies. Other… Read More →

A famous Greek storyteller called Aesop wrote this story thousands of years ago. It is a fable, which means it has a lesson to teach: When we have a problem, there is always some way to solve Read More →

Imagine if the cleverest predators from the age of dinosaurs still roamed the Earth. These creatures were terrifying hunters with fierce claws, jaws, and super senses. Check out predatory… Read More →

When George Eastman decided to make photography his hobby, "simple" was hardly the word to describe the pastime. He had to lug 50 pounds of camera equipment around with him, including the… Read More →

Climate change is hurting the planet. It creates problems for people, plants, and animals. Protecting the environment is important for our future. Climate activists work to get laws passed.… Read More →

Climate change is no joke! Discover how our weather is constantly changing and how too much change is not a good thing as global warming heats up Earth. Melting ice caps, desert droughts, and Read More →

Earth’s climate is changing, but many people are working hard and coming up with solutions to fight the climate crisis. From the first Earth Day to Fridays for Future, learn about the rise of Read More →

Exhaust from cars and factories pollutes Earth's air more each day. But does our air quality contribute to Earth's changing climate? And can climate change affect the air we breathe? Discover Read More →

Our climate is changing fast, partly because of our energy use. Everything from turning on a light to driving a car consumes energy. Can new energy technology help combat climate change?… Read More →

Extreme storms like hurricanes and blizzards are happening more often. Is this because of climate change? Read this book to discover the relationship between storms and climate change. You… Read More →

Why are some places flooding more than they used to? Why do hurricanes seem to get stronger every year? From hurricanes to heat waves, climate change is causing extreme weather around the… Read More →

Animals and plants all over the world are struggling to survive. Their food supply is decreasing, and their habitats are shrinking. Is climate change to blame? Discover how climate change… Read More →

Rapidly increasing sea levels are endangering coastal wildlife and contributing to major floods worldwide. In the future, some coastal cities may even be underwater. But what is behind this… Read More →

What's the difference between climate and weather? What effect do rising temperatures have on Earth? Read on to learn the answers to these questions and more. You'll find out how scientists… Read More →

Climate migrants are people who must leave where they live due to environmental changes caused by climate change. As Earth’s climate keeps changing, the number of climate migrants is likely… Read More →

Climate change is a big problem that affects the whole world. But what can we do to fix it? From scientists to farmers to activists, people are working together to find solutions to climate… Read More →

Being forced from home is something no one wants to experience. But climate change is causing flooding, new weather patterns, and destruction to houses and cities. It can make resources such… Read More →

Who do you think of when you imagine a climate scientist? Maybe a biologist? Or a chemist? But economists study the climate too! Meet fourteen different scientists who are working to solve… Read More →

As long as there have been girls in schools, there have been cliques—a particularly malicious and subtle form of bullying that isn't always recognized for what it is. And with the growing… Read More →