Grade 4

300 records found. Displaying 49 - 60.

Fall 2024 Cover: Crazy Birds
Animals

Crazy Birds

What's crazy about these creatures? The magnificent frigatebird can fly for two months without ever landing. The emu can't fly at all, but it can run more than 30 miles (48 kilometers) per… More →

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Fall 2024 Cover: Crazy Creatures
Animals

Crazy Creatures

The animal world has many crazy creatures. Capybaras can sleep in the water. The duck-billed platypus has venom-filled spurs. Colugos can glide from treetop to treetop. The purple frog lives… More →

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Fall 2024 Cover: Crazy Fish
Animals

Crazy Fish

What's crazy about these creatures? The red lionfish has fins that look like a lion's mane. The whitemargin stargazer discharges an electric shock. The bluestreak cleaner wrasse is the… More →

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Fall 2024 Cover: Crazy Frogs
Animals

Crazy Frogs

What's crazy about these creatures? The purple frog lives almost its whole life underground. The wood frog's heart stops beating in winter. The Argentine horned frog is also known as the… More →

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Fall 2024 Cover: Crazy Lizards
Animals · Reptiles and Amphibians

Crazy Lizards

What's crazy about these creatures? The Komodo dragon can eat a whole deer. The thorny devil is covered in spikes. The green crested basilisk can run on water. Read about the coolest lizards… More →

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Fall 2024 Cover: Crazy Mammals
Animals

Crazy Mammals

What's crazy about these creatures? Capybaras can sleep in the water. The duck-billed platypus has venom-filled spurs. Colugos can glide from treetop to treetop. Read about the coolest… More →

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Science

Crystals

Rocks and minerals are all around us, but they're not all the same. Discover crystals and find out how they form, what makes them unique, and how we use them. Explore some captivating… More →

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Biographies · Literature

Davy Crockett

It is no ordinary baby who climbs out of a cradle and starts walking the day he is born. Davy was larger than other children, and he was stronger, too. So strong that he could throw gators… More →

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Fall 2024 Cover: Digging into Soil
Decodable Readers · Phonics · Plants

Digging into Soil

Soil isn't just dirt. It is an ecosystem that supports all life on Earth. Learn what makes it special and practice reading words with the special vowel teams of oi and oy. These books use… More →

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Civics · Social Studies · U.S. History

Documents of America

How do Americans state what they believe in, how their representative government works, and more? By writing it down! Investigate great documents that have shaped United States history. Read… More →

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