Grade 4

People have been using prosthetics for thousands of years. Today, animals use them too! And in the future, the cutting-edge technology of bionics will add even more possibilities. Readers of… More →

Have you seen a robin in the garden or at the park? What about a seagull at the beach? Learn about different birds and their features in this book. The phonemes /ea/ir/ are featured in… More →

There are thousands of different types of birds. From the tiny hummingbird to the flightless penguin, each bird is different and amazing. Turn the page to discover lots of amazing… Bi More →

Bison are the largest mammals in North America. Elk are one of the largest deer species. When these mammals clash, who will win? Leveled hi-lo text guides readers through how these fierce… More →

In this book, early fluent readers will learn about democracy, the voting process in the United States, and the struggles and successes Black Americans have gone through to gain and practice… More →

Charging into battle surrounded by smoking fuses, Blackbeard was a terrifying foe to face! In this action-packed graphic narrative, colorful illustrations and engaging dialogue tell the true… More →

Black bears and mountain lions clash when they meet in the forest! In this hi/lo book, readers explore the secret weapons of these predators. Vibrant photos and engaging features highlight… More →

As darkness falls over the Amazon rain forest, a large black caiman waits in a slow moving, muddy river. Only the reptile's eyes and nostrils are visible above the water. The caiman is… More →

Welcome, Agent 359. This file is full of top-secret information about black holes. Learn the basics of how black holes form, their different sizes, and how they were found. Then, discover… More →

African deserts and grasslands are a good place to find a variety of predators. Caracals rely on sharp claws and soft footsteps to pull off successful ambushes. But black mambas take down… More →

In this book, early fluent readers will learn all about black widows. Vivid, full-color photos and carefully leveled text engage young readers as they learn more about this arachnid's… More →

In this book, early fluent readers will learn all about black widows. Vivid, full-color photos and carefully leveled text engage young readers as they learn more about this arachnid's… More →