Many times people explore "Drawing Classes" without much knowledge about what what is offered and what they aspire to learn. Below are some terms and Art Lingo simplified for your understanding.
Drawing: (definition: A picture or diagram made with a drawing medium. The Art of Activity of making Drawings.) You learn to develop the skill to represent an object, outline a figure, plan or sketch mainly by use of lines. This is the basic step of learning.
Drawing Medium: Material that are used to create a work of art or a drawing. Some common media are paper, pencil, charcoal and pen & ink.
Pencil Shading: Shading is used in drawing for varying levels of lightness or darkness on paper by applying media , which in this case is a pencil. It provides 3 dimensionality, depth and interest to a flat drawing. It is done by choosing medium, applying intensity and special techniques. It is suggested to start pencil shading once your foundation in drawing is clear.
Sketching: (A sketch is a rapidly executed freehand drawing that is not usually intended as a finished work.) By Sketching you can draw a rough outline or rough draft version of a final piece of art. You reach this level once your understanding of drawing and shading is clear.
Rendering: Through rendering, we add shade and colour inorder to create life like depictions. This is the ultimate level you can aspire for. Your understanding of Drawing as well as Shading, in both Black & White and colour medium, should be clear.
Best Wishes!
Bhawna K