Grade 4

Imagine having a job that has been around for thousands of years. People called cryptologists have been making—and breaking—codes almost as long as humans have written things down. Read about Read More →

A Fun and Empowering Graphic Novel That Helps Kids Understand Dyslexia Through Humor, Science, and Real-Life Experience Professor Thomas Cat thinks he knows everything about the human brain… Read More →

Take your youngsters on a voyage across the universe and ignite their passion for exploring the night sky in this fascinating and imaginative guide to astronomy for kids ages 6 to 10. "This… Read More →

The first in a series of books by Elliot Kruszynski, exploring the histories of modern technologies, introduced and explained by a helpful (if somewhat arrogant) dog called Professor Wooford… Read More →

Who is the greatest quarterback in football? Which team has the best season record? Learn the answers to these questions and many more by exploring stats from the greatest football teams and… Read More →

A football soars through the air—and the perfect pass is fumbled by the receiver! In one moment, a team that barely made the playoffs can beat the favorite to win the Super Bowl. Dive into… Read More →

The professional gaming industry includes esports players, streamers, sponsors, and others. Learn the difference between esports and streaming, find out how the industry of professional… Read More →

How do apps help us complete tasks, listen to music, play games, or find information? Like other computer programs, they use instructions known as code. Learn how to design, program, test,… Read More →

Do you know how your favorite video game works? Computer instructions called code bring the characters, challenges, and stories in the game to life. Learn what animation is and how it works.… Read More →

Do you enjoy playing computer games or learning programming code? As a child, Ada Lovelace loved learning about math and science. As an adult, she used that knowledge to create the first… Read More →

Hockey games are fast-paced and full of quick passes and goals. Fans and coaches keep up with each hockey game using one great tool. Stats! Learn about the history of hockey and follow its… Read More →

Anything can happen in a hockey game! A player can race through a field of opponents, scoring a goal just as the buzzer marks the end of the game. Explore some of professional hockey's… Read More →

Soccer is one of the world's most popular sports. Fans can keep up with soccer's intense competition through stats. From assists to goals to epic saves, explore the stats of soccer's best… Read More →

Thrilling upsets are part of what makes professional soccer so exciting! Sometimes, a team that barely makes it to the playoffs can win it all on a penalty kick for the league championship.… Read More →

Every living thing on our planet needs air to survive. Most of the time, we hardly even think about Earth’s air. But did you know that many of the things we use every day—from cars to… Read More →

Nearly all living things depend on Earth’s land and its resources to survive. But did you know that people do many things that hurt the land? The damage sometimes destroys forests, which are… Read More →

From brilliantly colored birds and wild elephants to towering trees and exotic flowers, rain forests are home to more than half of Earth’s plants and animals. People living in rain forests… Read More →

From roaring oceans to trickling streams, water covers seventy percent of our planet! But did you know that less than one percent of Earth’s water is usable by humans? Most water on Earth is… Read More →

A machine floats on top of the ocean, drawing in water. But what is it doing? It’s picking up plastic so animals don’t get hurt! Every day, researchers are coming up with new ways to help… Read More →

Jump in the ring with the greatest grapplers of all time. Get ready to pin pro wrestling’s biggest question: Who is the greatest of all time? Leap into the ring with thrilling stories and… Read More →

When Prudence Crandall opened a school for young girls in 1831, she didn't expect trouble. But that is just what she got when she allowed African American girls to attend. A Quaker and… Read More →

In ancient Greece, a princess rises to a challenge: Psyche lives in the comfort of her parents’ wealthy kingdom. But when her beauty draws the jealous anger of the powerful goddess Aphrodite, Read More →