Among all the artistic media, pencil drawing stands out as one of the simplest, yet most varied medium. At some time or other, nearly every great artist has produced notable works in pencil--which only further underlines its universal appeal. no single school of thought has predominated for long, yet the range of sub-genres available in pencil drawing is staggering--ranging from caricature and cartooning, to pure doodling and the more complex designs associated with commercial art. A pencil sketch is a rapidly executed freehand drawing. It may serve a number of purposes: it might record something that the artist sees, it might record or develop an idea for later use or it might be used as a quick way of graphically demonstrating an image, idea or principle. The term is most often applied to graphic work executed in a dry medium. Sketching is generally a prescribed part of the studies of art students.