A sketch (ultimately from Greek σχέδιος - schedios, "done extempore") is a rapidly executed freehand drawing that is not intended as a finished work. A sketch may serve a number of purpose: 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 principal. Sketching is generally a prescribed part of the studies of art students.