This unit is intended to provide the student with clear understanding of the function of interest groups and lobbyists in the American Democratic political system. It has been designed to be used for 12-17 days of class work. However, it is possible to alter this time by several days depending upon the individual situation. "Why Lobby"? is divided into seven units. Each has its own set of objectives, activities, resources and evaluation, and is placed in a sequential order to develop a clear picture of the subject matter. "The Lobbyist", a booklet explaining who lobbyists are, how they operate, and how to get involved, is a resource to be used in conjunction with the guide. The 18-year-old vote is used as an example in this booklet. The game takes three class periods to play, with 22 students taking part. (Author/OPH)