Part of GBA's outstanding audio-education designed for one-on-one listening by project managers, and/or as material to spur discussion during brownbag seminars or other informal training sessions. Like other GBA audio education programs, Program Four ("Contracts and Contract Formation") uses dramatization to make its points. All roles are played by professional actors, supplemented by sound effects, to create a "mind's-eye video" that can be played in vehicles during commutes to and from home or project sites, while jogging, or during other times when training would be possible if only a means were available to make it happen. This is the means, developed by GBA's former Practice Education Committee.