Lightbox

Presents information on simple machines with a focus on wheels and axles. Explains what wheels and axles are, how wheels and axles work, and includes examples of uses.

Text and pictures introduce the wedge, a simple machine used primarily to split objects.

Text and pictures introduce the screw, a simple machine used as a ramp, to lock things together, and more.

Text and pictures introduce the inclined plane, a simple machine consisting of a slanted surface or ramp to make work easier.

Introduces the various ways to determine time including calendars, clocks, stopwatch, and timer.

Illustrations and easy-to-read text describe a number of different shapes.

Introduces the ways in which patterns are used to identify all kinds of things in the world.

Simple text and illustrations explain how we use money, what each coin is worth, and how to count money.

Simple text describes the basic units of measurement and how to use tools to help measure objects.

Simple text introduces children to graphs, explaining how they work and how they can be used.