Levers are everywhere. Readers will learn about historical and present-day uses of levers and how levers make countless everyday activities much easier. A simpl
What are levers? How do levers work? Do bicycles have levers? For the answers to these and many other questions, read Levers. See how scissors are actually two
In Simple Machines: Lever, young learners in grades 1–3 will explore how levers give us the lift we need. From scissors to wheelbarrows, this 24-page title us
A teeter-totter is more than fun to play on, it's also a lever, one of the six simple machines. This accessible book introduces readers to the lever through rea