This article offers practical advice for teachers interested in using Inventing Games (IG) as a way to facilitate learning about game structures, rules, and the principles of fair play that they can apply not only to game play, but to everyday life as members of a democratically organized society. Inventing Games gives students the opportunity to create their own games and understand the underlying constructs of games within a particular category of the TGFU games classification. This article focuses on the invasion game category, which includes games such as basketball, hockey, football, netball, soccer, and ultimate Frisbee. The IG process involves ten stages, which can be organized into a unit over varying numbers of classes, depending on the desired outcomes, grade level, experience, and student ability. (Contains 2 tables.)