A photographic introduction to pulleys for beginning readers, explaining what pulleys are and how they work, looking at different types of pulleys, and discussing pulleys and complex machines.

"Simple text, full color photographs, and illustrations introduce beginning readers to the basic principles of wheels and axles. Developed by literary experts for students in grades 2 through 5"--Provided by publisher.

"Simple text, full color photographs, and illustrations introduce beginning readers to the basic principles of screws. Developed by literary experts for students in grades 2 through 5"--Provided by publisher.

Presents a look at pulleys, explaining how these simple machines work and describing some common examples that have been used throughout history.

Presents a look at wheels, explaining how these simple machines work and how they have been used throughout history.

Looks at the function and everyday uses of screws

"Presents information on simple machines with a focus on levers. Explains what a lever is, how levers work, and includes examples of past and present uses. Intended for third to fifth grade students"--Provided by publisher.

"Presents information on simple machines with a focus on pulleys. Explains what a pulley is, how pulleys work, and includes examples of past and present uses. Intended for third to fifth grade students"--Provided by publisher.

An introduction to pulleys that describes their parts, functions, uses, and history.

Discusses inclined planes, including how they work and how they help people, and examines their uses and history.