Grade 4

What dark secrets are concealed within the twisted corridors of an ancient labyrinth? Young readers will explore the mysterious tomb of Shi Huang, the first emperor of China. This underground More →

Chihuahuas are small dogs with big personalities. A blend of the Chinese Crested and Techichi breeds, these travel-size dogs are popular pets in the United States today. Eager students will… More →

Ticonderoga Cruisers use their advanced Aegis System to defend U.S. Navy warships. Young students will join these guided-missile cruisers in action and read about the advanced weapons and… More →

Three-toed sloths have a clever way of protecting themselves from nature's fiercest predators. Sloths have green algae growing on their brown fur, helping them blend in with the mossy bark of More →

Because of strong herding instincts, Collies often try to round up animals and people. The movie “Lassie Come Home” featured one of these dependable dogs and made Collies popular pets. Young… More →

On February 5, 2008, a powerful tornado ripped through Jackson, Tennessee, leveling everything in its path. Dangerous and unpredictable, tornadoes are monster storms that can strike without… More →

Bulldogs have flat, wrinkled faces and wear permanent frowns. These non-sporting dogs once fearlessly fought bulls in a sport called bull baiting. Young readers will track the history of… More →

From the front lines of battle to the recovery process at home,Combat-Wounded Dogsshines a spotlight on real-life dog heroes that have been injured while serving their country during wartime. More →

A Marine Expeditionary Unit is a small, quick reaction force used to immediately respond to any crisis. Readers will explore what makes up a unit, what tasks they often perform, and what… More →

Concept cars are made to introduce new ideas and designs. They are first shown to the public at car shows. Young readers will learn about the history of concept cars, how concept cars are… More →

Bullet trains originated in Japan. They are the fastest trains on Earth. Young readers will learn about the history of bullet trains, the technology that makes their high speeds possible, and More →

Supersonic jets travel faster than the speed of sound. These jets are designed to maintain stability and function at very high temperatures. Kids will read about the technology, history, and… More →