Grades 2 - 5

High-performance engines make these boats capable of incredible speeds. Young readers will learn how powerboats are designed to reduce wind resistance in their goal of reaching the fastest… More →

Levers are simple machines that make work easier. There are three different classes of levers. Students will learn what levers are, how the classes of levers differ, and how the construction… 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 →

Pulleys are simple machines used to lift and move loads. Builders use pulley systems to lift tools or materials. Elevators use pulleys to move up and down. Kids will learn how pulleys make… More →

We use wheels and axles several times every day. Young readers will learn how a wheel and axle work together, how they make work easier, and how they are used in larger, complex machines. More →

Screws are simple machines used for many different jobs. The concept of a screw is used in snow blowers, drills, and presses. Kids will learn how screws work and how they are used in complex machines. More →

Travel at top speeds in this fast-paced series! Reluctant readers will explore the fastest cars, boats, jets, motorcycles, and trains in the world. They will learn the history of these… More →

Sports cars are one or two-passenger vehicles that have a low center of gravity and steering designed for precise control at high speeds. Young learners will explore the history of sports… More →

High speeds, superior handling, and sleek design are all features of super cars. Readers will learn about the history and technology of these extreme sports cars as well as how they are… More →

Wedges are simple machines used to split, lift, or hold an object in place. Children will discover how wedges perform jobs for people and how they make everyday life easier. More →

How does blood move around inside the human body? Students will learn all about the heart, blood cells, blood vessels, and other important parts of the circulatory system. More →

As soon as food touches your tongue, it begins a long process of moving through different parts of your body. This book explains how the human body breaks down food to get nutrients and stay healthy. More →