Grade 4

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 →

The United States Navy uses the Super Hornet to carry out bombing missions and to protect the fleet. Young learners will read about the Super Hornet in action, the history of the Super… More →

Football is a hard-hitting game. From games in the back yard to high school to the NFL, people love to play and watch football. Kids will learn the history, basic rules, and equipment of… 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 →

Tennis is a popular recreational sport played by many people, but it is also played professionally in tournaments all over the world. Young readers will learn the basic rules of tennis, the… More →

People of all ages love to play and watch the game of baseball. It has been a part of American history for around 150 years. Young readers learn the history of baseball, learn how the game is More →

The MH-53J Pave Low’s main mission is to pick up and deploy troops behind enemy lines. It flies low to the ground and uses advanced technology to sneak in undetected. Young learners will find 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 →

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 →

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 →

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 →

The M109A6 Paladin is a large, mobile howitzer. It can fire rounds several miles to support ground forces. Readers will learn about the features that make the Paladin successful, how it… More →