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 inclined planes, explaining how these simple machines work and describing some common examples, such as ramps, that have been used throughout history.

"Presents information on simple machines with a focus on wedges. Explains what a wedge is, how wedges 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.

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

"From lightbulbs and bottle caps to water taps and peanut butter lids, screws are everywhere! Learn about screws and make your own spinning top with the help of an alien engineer"--

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