Grade 1

Inside this book, a huddle of penguin chicks will warm your heart as they warm their bodies. The babies need mom, dad, and one another to survive the frigid temperatures of their Antarctic… More →

Tiny bristles called setae help earthworms burrow several feet into the ground. The earthworms bring nutrients and minerals to the surface, and on the way, their tunneling aerates the ground. More →

Animals with an appetite for hedgehogs must work hard for their dinner! They need a pain tolerance for sharp spines and the strength to pry tightly curled bodies. Get a feel for why hedgehogs More →

When kangaroos gather in large groups, they get loud and physical. Males duke it out in boxing matches, jumping and jabbing with feisty determination to earn the “dominant male” title. Be… More →

Ostriches are birds that can't fly. They take it in stride, sprinting in short bursts instead. When ostriches can't run from danger, they face it head on. Well, with their heads on the… 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 →

When bullies like lions and hyenas are on the prowl for a lunch to steal, leopards keep their cool. The clever cats drag their kill with them as they climb high into trees, where they can… 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 →

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 →

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 →

Warthogs are named for the thick knobs of skin between their eyes and snouts. These unsightly protrusions provide a cushion that comes in handy not in the face of predators, but against the… 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 →