Technology

We use wheels and axles several times every day. Young readers will learn how a wheel and axle work together, how they make work easier, and how they are used in larger, complex machines. More →

Wedges are simple machines used to split, lift, or hold an object in place. Children will discover how wedges perform jobs for people and how they make everyday life easier. More →

A new road needs to be built, but first a grader must flatten the dirt underneath. A grader uses a blade to push the dirt down and prepare the way for a new road. Students will discover other More →

These machines are very important in keeping a farm running smoothly. A tractor pulls other machines through the field. Plow through this book as a tractor pulls a plow, a planter, or a mower. More →