This document discusses the six types of simple machines: lever, screw, pulley, wheel and axle, inclined plane, and wedge. It provides examples for each type and explains how they make work easier to perform. Lever, screw, and pulley are described first, followed by wheel and axle, inclined plane, and finally wedge. In summary, the document outlines the six fundamental types of simple machines and how they help to mechanically advantage work.