In this series students will learn amazing facts about six cool subjects while developing their understanding of what technology is, why each object was created, and how the object functions. Every book includes illustrations with labels and color photographs. Students will also learn about some of the tools, instruments, and processes used in creating and designing the objects. They will read about how technology helps people, how it has changed people's perceptions of the world, and how technology can affect the environment in good and bad ways. Readers will discover that society's needs and wants change and these changes have an impact on the development of new technologies. A timeline, Tech Knowledge fact boxes, and unique illustrations showing design details are included in each book. Hans von Ohain of Germany built the first working jet engine in 1937. This book describes some of the improvements made on jet planes since then, including the design of the Concorde and super jumbo jets such as the Airbus A380. Students will be introduced to the forces of flight--lift, thrust, drag, and weight--and to the movable parts of jets, including flaps, ailerons, and rudders and how they work.