It is hard to function in Mathematics without an understanding of functions. This set of six (6) posters attempts to de-mystify and also provide practical tools. The terms used to define a function are spelled out and the special notation used to represent functions is clarified. The various kinds including logarithmic, exponential, inverse, and one-to-one are addressed along with the uses for the vertical and horizontal line test. Poster size: 19” by 25”.