Grade 4

In this title, early fluent readers meet Sophie as she learns about her circulatory system. Read along as Sophie, her gym teacher, and her classmates discuss how our circulatory systems pump… More →

Movements called vibrations produce sound. Small vibrations make a quiet sound. Big vibrations make a loud sound. This book teaches children what sound is and how it can be measured. More →

In this book, readers will learn about the unique and defining features of South Africa. Vibrant, full-color photos and carefully leveled text will engage young readers as they learn more… More →

In this book, early fluent readers will learn about the unique features, characteristics, and wildlife of the Southern Ocean. Vivid, full-color photos and carefully leveled text engage young… More →

In this book, early fluent readers will learn about famous shipwrecks in the Southern Ocean, including Endurance, Governoren, and MV Explorer. Learn about the final voyages of the ships and… More →

In this book, readers will learn about the unique and defining features of South Korea. Vibrant, full-color photos and carefully leveled text will engage young readers as they learn more… More →

After decades of war, South Sudan became an independent country in 2011. Though its people face struggles as they build their new nation, they do have reason for national pride. Their country More →

Did you know that astronauts train for spacewalks by going underwater in their spacesuits? Or what about that engineers have programmed robots to explore space on their own? Astronauts,… More →

Did you know that the very first rockets were made from bamboo and gunpowder? What about that a Mars rover once played a birthday song for itself? And how about that the International Space… More →

From the moon landing to aliens visiting Earth, space is full of mysteries. But some things can be explained with science. Learn about the scientific method and how it can help you discover… More →

From astronaut food and spacesuits to meteor showers and planets with rings, space is full of incredible things. How do we know so much about it? Sometimes you just have to ask why? Lively… More →

Exploring the universe greatly depends on space robots. They go where astronauts cannot go and survive where astronauts cannot survive. Food, water, sleep, and oxygen are not required for… More →