Grade 6

Los combustibles fósiles calefaccionan nuestros hogares. Impulsan a automóviles, camiones y aviones. Pero cada vez que se usan estos combustibles, aumentan las temperaturas de la Tierra.… Read More →

Get up-close with the most fearsome animals in the animal kingdom! With incredibly detailed photography of animals' gruesome features and fascinating facts about terrifying predators from… Read More →

Twelve-year-old Freedman and his father Nehemiah, a freed slave, make their living on a farm in Delaware during the 1850s. When Nehemiah is taken prisoner by slave-hunters in the Deep South,… Read More →

Explore outer space through interactive augmented reality experiences! Did you know that a 220-million-pound (100 million kg) asteroid flattened millions of trees in Russia in 1908? Or that… Read More →

From the late 1800s to today, comic books have been a distinct and beloved form of literature. But the history of using pictures to tell stories stretches back centuries. From prehistoric… Read More →

The sports world is full of epic comebacks, upsets, chokes, and clutch performances. The most memorable buzzer-beating baskets, double-digit comebacks, and unexpected meltdowns are all here… Read More →

Email, cell phones, Facebook, texts, letters … even good old-fashioned face-to-face conversation. Teens today have all kinds of choices when it comes to communication. But did you know that… Read More →

Reading texts or direct messages, communicating through speech or sign language, and viewing artwork are all among the many ways people share news, ideas, and feelings with one another.… Read More →

Communism is a political idea based on sharing wealth and removing social class. But how does this work in action? This fascinating title looks at communism, its history, and its place in… Read More →

A competitive streak can be the driving force behind excellence in school, sports, and other pursuits. Some young people take competition too far, however, or fear competition and avoid it at Read More →

“The discovery both of [geometry] and of the other sciences proceeded from utility.”—Proclus Lycius, Greek philosopher, fifth century CE “Geometry is the knowledge of the eternally… Read More →

Each year in the United States, about 1.6 to 3.8 million athletes experience a concussion. A concussion is a brain injury caused by a hit to the head that forces the brain to move quickly… Read More →

Conflict—nobody likes it. And from the hallways of your school to the family dinner table, conflict can be hard to avoid. But conflict doesn't have to be all bad. If you handle a conflict… Read More →

The rise of the internet has connected people around the globe. Computers have come a long way—from the bulky machines of the 1950s to today’s slim laptops and pocket-sized smartphones.… Read More →

Caused by contaminated food, water, or exposure to someone with the virus, polio is a deadly virus that has seen near eradication thanks to the development of the polio vaccine. American… Read More →

Consent isn't just about sex. From an early age, kids are taught to respect personal space. They learn to express themselves and how they feel. While they must be taught that kissing,… Read More →

Today, engineers are creating ever-evolving technology to help us build not just bigger, but better. This book explores the engineering evolution in construction, from past to present, and… Read More →

Ancient societies built massive monuments, many of which still stand. How did ancient engineers and builders raise up the Great Wall of China or the Great Pyramids of Egypt? They often needed Read More →

Rachel's junior year is going to be perfect—she's taking AP classes, is first-chair viola, and is busy planning her college visits. Then Misty, Rachel's wild and unpredictable cousin, lands… Read More →

Civil War monuments that pay tribute to Confederate soldiers and political leaders are located in many major cities across the United States. While some see these statues and symbols as part… Read More →

As a part of the British Commonwealth, Australia's culture shares many similarities with British culture--and their menu is no exception. Paired with the cuisine of the Aboriginal peoples… Read More →

Over the centuries, Austria was settled by many different groups and became the center of a large empire. Each group brought its own customs and cuisine, eventually mixing to create the rich… Read More →

The fifth largest country in the world, Brazil stretches across nearly half of South America. Home to a vibrant blend of indigenous, African, European, and immigrant cultures, Brazil boasts a Read More →