Millions of tons of plastic slip into oceans every year. Some floats and travels slowly with the currents, endangering the health of marine animals. The rest is hardly visible but is far more dangerous. Tiny bits of plastic sprinkle the ocean's surface or mix into the sandy seafloor and beaches. It ends up inside birds, fish, and other animals, harming them-and ultimately humans. Experts struggle with fear and hope as they work to stop the flood of plastic threatening living organisms acro...

The Chumash thrived along the Pacific coast in California for centuries. But eventually new settlers wanted their land and forced the Chumash into a new way of life. Today, the Chumash celebrate their traditions as they move toward the future in modern America.

A massive tsunami caused by the strongest earthquake to ever hit Japan triggered the world's worst nuclear crisis since the Chernobyl accident 25 years earlier. The monster waves that crashed into the Fukushima Daiichi nuclear plant in March 2011 killed 15,000 people and caused nuclear reactor meltdowns that threatened the lives of thousands more. The waves receded long ago, but the devastating effects of the nuclear accident still linger.

Scientists have recently started studying plastic pollution and our food supply. And, make no mistake, you are eating microscopic pieces of plastic everyday. What does it mean for our health? And what can you do about it? Students will get practical tips on how they can get involved and become part of the solution.

On-point historical photographs combined with strong narration bring the story of the first photograph of a black hole to life. Kids will learn why it was so hard to take a photo of something so dark it does not reflect light, and so far away it could barely be reached. Primary source quotations bring the amazing accomplishment to life.

Betsy Ross made many flags during the American Revolution, but did she sew the first flag? Infographics, leveled text, and primary sources help readers follow the fact and fiction found in this tale of stars and stripes.

Far in the future, Earth’s oceans have risen. Coastlines have changed to create new islands far from shore. Even worse, Earth has been invaded by aliens known as the Hunters. They are masters of camouflage and enjoy hunting down humans and other creatures for sport. On the island of Humanhattan, one family is ready to make the dangerous trip to the safety of the government Fortress. But when Rio and his friend, Ani, are separated from their parents, they have to rely on their wits and quic...

Deeply religious, the ancient Greeks honored many gods and goddesses. The ancient Greeks believed these gods and goddesses had great power over the weather and the Earth. But they weren’t all-powerful, and they had flaws. From Zeus to Athena, read about the family of gods and goddesses that the ancient Greeks believed watched over them.

The Iroquois Confederacy served as model for the founding fathers who wrote the U.S. Constitution. The Iroquois today continue their proud tradition of representative democracy as they thrive in modern America.

Present-day Virginia was home to the early Powhatan tribes. But settlers were eager to explore the rich land and the rivers in the area. The Powhatan were forced to adapt to new ways of life. But they continue to thrive in modern America, remembering and honoring their past traditions.

Imagine traveling a river through time. You float by Native Americans trapping beaver and pass boats full of European settlers. You spy waterwheels turning and factories buzzing with activity. Finally modern cities crowd the banks. Dive into this book, and learn about the changing lives of people in the Hudson River Valley.

Some of the most important American products and ideas have been developed by people born outside the United States. They have influenced every part of U.S. culture, from what people wear and drive to how they stay healthy, how they communicate with each other, and what they do for fun. Meet 25 immigrants who have led the way with life-saving inventions, by opening up sports to women and people of color, and so much more.