Grade 1

Did you know that jackrabbits can move up to 40 miles per hour? They have to be quick to avoid hungry predators. Find out other ways these speedy animals have adapted to survive in this… More →

Red-tailed hawks have excellent eyesight. These birds of prey soar high in the air, scanning open fields for small prey. When they find their target, they go into a dive and ambush their… More →

Red foxes get a lot of use out of their bushy tails! Called a brush, it helps them balance, communicate with other foxes, and it even keeps them warm on cold nights! See what else these sly… More →

Much of our understanding of ancient plants and animals comes from the fossil record. Big or small, fossils offer images of life on Earth from billions of years ago! Young paleontologists… More →

When it comes to lemurs, it's a woman's world. Females rule—they eat first, win all family arguments, and fight enemies on the front lines. Learn why you'd want to be “one of the ladies” in a More →

Underwater, a large, lively community of unique animals thrives. Many of these animals belong to the fish class. There are colorful clownfish, lurking sharks, and silly sea horses. There are… More →

Members of the insect class often get a bad rap. People swat at them, stomp on them, and go to great lengths to repel them. Though some insects are pests that spread disease, many are… More →

Compare a hummingbird and an ostrich; the differences are striking! One is tiny and hovers in the air like a helicopter. The other is massive and stays grounded, sprinting rather than flying. More →

Dinosaurs, the world's most notorious reptiles, became extinct a long time ago. However, their cold-blooded, scaly reptile relatives still creep around today. While people no longer have to… More →

Some animals lead a double life. First, they pose as aquatic creatures, breathing through gills and using tails to maneuver underwater. Then they exchange these features for legs and lungs to More →

The largest animal alive is a mammal. It's the 150-ton blue whale. This whale is not only large but also loud—louder than a jet engine! Turn the pages of this book to learn about the… More →

Weighing in at more than 400 pounds, anacondas are the world’s heaviest snakes! This book explores how these massive creatures look, where they live, and the way they stalk prey. More →