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 →
Grade 4
1318 records found. Displaying 1285 - 1296.
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 →
Gymnastics is a sport requiring strength, flexibility, and agility. Gymnasts perform routines on different pieces of equipment during competitions. Young readers will discover the history and 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 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 →
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 →