Grade 4

Quokkas live on a couple of small islands off of Australia. When they aren't sleeping in a nice shady spot in the grass, they hop from spot to spot, looking for some good plants to eat. But… More →

In the early morning of April 26, 1986, a reactor at the Chernobyl nuclear power plant became unstable, causing a huge explosion. But the disaster was only just beginning. Follow along with… More →

In this book, early fluent readers will learn how Brazilian rainbow boas get their shimmering, colorful scales and how their colors help them warn off and confuse predators and camouflage in More →

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Rain forests are home to lots of amazing wildlife. From tiny poisonous frogs to beastly big cats, there are plenty of animals to discover in this book! Look inside to find out all about the… More →

In this book, early fluent readers will learn about the history of Ramadan and Eid al-Fitr, including when, where, and who first observed and celebrated it, its meaning, the traditions… More →

Ramps are simple machines used for work and play. Workers use them for easy loading and unloading. Skateboarders use them to do tricks. Readers will learn how ramps make work easier and how… More →

Plug in and power on! The world of gaming is at your fingertips in this high-interest series. Leveled text explores the history of video games, introduces some of today's popular titles, and… More →

Everything has a life cycle, even the objects we use every day! Plastic bottles, aluminum cans, and glass jars can all be recycled again and again. Follow the journeys of these objects to a… More →

Red foxes and fishers are well adapted to hunting in the North American woodlands. If these two predators fought, would the red fox's stealthy ambush claim victory? Or would the fisher's… More →

In Reference Maps, early fluent readers will learn about common map features, such as map keys and compass roses, as well as specific features and the many kinds of reference maps. Bright,… More →

In Refrigerators, early fluent readers learn about the science, engineering, and technology behind refrigerators. Vibrant, full-color photos and carefully leveled text engage young readers as More →