Grade 4

The Apollo astronauts gave people a new way of looking at the world—and so did modern artist Alma Thomas. In 1969, people around the world watched as the Apollo 10 astronauts sent the… Read More →

Outside in the daytime, it is light. How does light help us to see? How are shadows made? How do we work and play when it is dark? How does light help keep us safe? Read and find out. Read More →

Where does light come from? What do colors have to do with light? Light is a form of energy. Life on Earth is made possible because light from the sun carries heat to the earth. This book… Read More →

Color is hidden in white sunlight. It has red, orange, yellow, green, blue, indigo, and violet. All the colors in light bring beauty to the earth. How do we see the colors in sunlight? And… Read More →

Imagine you are inside a dark closet. Everything around you looks black. You can't even see your own hands in front of your face. Why? Your hands are still there, but something important is… Read More →

One hundred bolts of lightning strike the earth every second. Each bolt has two or more electrical flashes moving quicker than the eye can see. In Lightning, find out about the powerful… Read More →

What causes thunderstorms and lightning? Where and why do hurricanes form? How are blizzards more dangerous than other snowstorms? To answer these questions, you’ll need to know about… Read More →

In this Hanukkah manual for the contemporary Jewish family, holiday history, rituals, activities, songs, and recipes provide tools for creating meaningful family moments in the light of the… Read More →

Enslaved African Americans longed for freedom, and that longing took many forms—including music. Drawing on biblical imagery, slave songs both expressed the sorrow of life in bondage and… Read More →

Lilly and Theresa run into bullies at the pool, Spider and Bugsy, who tease Theresa but take an interest in Lilly. Lilly faces tough decisions about being a good friend versus trying to fit… Read More →

Lindsey Vonn is one of the most successful skiers of all time. She's won seventy World Cups and holds records for the most victories in both downhill and super-G skiing. She is also known for Read More →

In 2009 American composer and performer Lin-Manuel Miranda stood on a stage at the White House, about to perform a rap song at the White House Poetry Jam. When he explained that the song's… Read More →

Lionel Messi is one of the best soccer players in the world. He's led his team—Fútbol Club (FC) Barcelona—to several championships, he's won the FIFA Ballon d'Or award five times, and he's… Read More →

Lionel Messi dominates soccer. Claiming every major trophy in soccer, Messi is one of the sport’s most decorated players. He has an Olympic gold medal, a World Cup win, seven Copa del Rey… Read More →

Soccer legends Lionel Messi and Pelé thrill fans with their dazzling moves, incredible goals, and World Cup wins. But which legendary striker is the best? Follow their careers and compare… Read More →

They’re some of the fiercest animals on the planet, but still in danger! Discover great cats in their natural habitats, where they have no natural predators. Lions are some of the finest… Read More →

How do lions hunt? How do they interact with other lions? Discover the answers to these questions and learn other fascinating facts about lions. From their habitat to their physical… Read More →

Lions and zebras go face-to-face in a battle between predator and prey. Lions are strong and powerful killers. Zebras can deliver deadly kicks. Explore how these remarkable animals attack,… Read More →

Do you like horses? Then you'll love learning all about the Lipizzan. Lipizzans have beautiful white coats and flowing manes. But did you know that Lipizzans aren't born white? They often… Read More →

From the time she was a very young girl, Rachel Carson felt a bond with nature. Growing up in Pennsylvania, she spent hours exploring meadows and woods, dreaming of seeing the ocean. As… Read More →

Nature’s creatures can be ferocious! Lions and sharks leave many animals running scared. But some predators may be hunting beneath your feet or above your head—and you don’t know they’re… Read More →

You may know that Little Mix became instantly popular after winning The X Factor. But did you know that the group: • didn't know one other until they met on the TV show? • had one fan… Read More →