This document provides instructions for shading an object to show light and shadow. It instructs the reader to: 1) Sketch the object (an apple) and background (table) lightly, then determine the light source location. 2) Draw the apple's cast shadow by aligning a ruler to the light source and apple edge. 3) Shade the apple, distinguishing the light and shadow sides, with the darkest shading at the core shadow and where the apple touches the table. 4) Gradually blend the shading to avoid hard edges, with the area under the apple darker than further areas.