Grade 4

What might houses of the future look like? Imagine it’s 2055. What will our houses be built with? What will we do in them? What gadgets and gizmos will we have in them to make our lives… Read More →

Say your name with pride! Trudie Hamburger is the only Jewish kid living in the small southern town of Colburn in 1962. Nobody else at her school has a father who speaks with a German accent… Read More →

Stella Bowles was in sixth grade when she became an environmental activist to campaign against sewage draining into the LaHave River. In this book, she tells the inspirational story of how… Read More →

How will school be different? Imagine it’s 2055. Technology could enable students to set their own pace and make learning personalized. Will we still have books? Will teachers still give us… Read More →

This activity book helps kids get along with their brothers and sisters. Kids think that they are expected to love their brothers and sisters unconditionally, but sibling relationships can… Read More →

The 16th President of the United States, Abraham Lincoln was killed by an assassin’s bullet on April 15, 1865. Lincoln preserved the union of the nation, but after the Civil War he struggled… Read More →

Could there be aliens hiding on one of Saturn's moons? Scientists are trying to answer this and many other questions about the possibility of life outside Earth. Learn about the building… Read More →

Black holes are some of the most mysterious objects in the universe. Astronomers want to figure out how these strange objects work, from how they form to what happens inside of them.… Read More →

How did the universe begin? How can we see back in time? Scientists are uncovering mysteries at the edges of our solar system and beyond our galaxy. From dark matter to colliding planets,… Read More →

On Easter in 1722, a fleet of Dutch ships exploring the southeastern Pacific Ocean came across a small island that at first seemed uninhabited. Instead, the sailors found a community of… Read More →

In 1911 an American explorer came across an ancient city hidden high in the Andes Mountains of Peru. Since then, explorers, archaeologists, and tourists have been fascinated by this beautiful Read More →

Could there be life on Mars? Scientists are trying to answer this and many other questions about our next-door planetary neighbor. Learn about Mars's hidden water, the robots exploring Mars's Read More →

Two thousand years ago, disaster struck the ancient Roman city of Pompeii. When Mount Vesuvius erupted, a deadly cloud of superheated ash, rock, and gas descended on the city and its… Read More →

How do stars form? What happens to them when they die? Scientists use many different tools and techniques to solve mysteries about stars.The answers are not as simple as you might think!… Read More →

Five thousand years ago, someone (or a lot of someones) shaped and assembled a group of 25-ton rocks in southwest England. We call it Stonehenge. The summer and winter solstices are amazingly Read More →

Massive pyramids tower over the Giza Plateau near Cairo, Egypt. Built in the Bronze Age, these immense stone structures were engineered with remarkable precision. How did the ancient… Read More →

In August 2011, an expedition in the Gobi Desert region of Mongolia uncovered a long-forgotten section of the Great Wall of China. In 2015, nine new sections of the wall were located in… Read More →

Does the moon hold clues about the earliest life on Earth? Scientists are trying to answer this and many other questions about our nearest neighbor in space. Learn about how the moon formed, Read More →

If you are looking for a spine-tingling nonfiction read, you have found it! Explore the photos, stories, and supposed evidence behind some of the world's most curious mysteries like Bigfoot, Read More →

Late one night, ecologist Jonathan Martin was searching for tree frogs in his Wisconsin backyard when he made an unexpected discovery. As he shined an ultraviolet flashlight in the direction… Read More →