Grade 4

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 →

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 →

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 →

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 →

People swim for many different reasons—recreation, exercise, or competition. The goal of competitive swimming is to be the fastest in a variety of events featuring different strokes. Kids… 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 →

Basketball is one of the most popular sports in the world. Players must dribble, jump, defend, and shoot their way to victory. Children will learn the history, rules, and equipment needed to… More →

The United States Air Force uses B-1B Lancers as strategic bombers. A B-1B Lancer can carry over 125,000 pounds of bombs! Kids will discover the history of the Lancer, the technology behind… More →

The M2A2 is an infantry fighting vehicle (IFV) used by the United States Armed Forces. It transports, assists, and protects infantry. Students will learn about the history and technology… More →

The B-52 Stratofortress has been in service for over fifty years. It is a model of consistency for long-range bombers. Readers will explore the technology behind the B-52, the weapons it… More →