This teacher's guide is part of a curriculum designed for infusion into secondary U.S. history courses to help students explore purposes of American law. In the curriculum students study about legal decision making during the American colonial period, explore methods our legal system uses to establish facts, learn that individual liberty is a primary purpose of the U.S. Constitution, study laws aimed at abolishing child labor in America, and examine the nature, purpose, and consequences of Prohibition. Step-by-step procedures for teaching each of the curriculum's five units are provided in the guide. For each unit an overview is provided and purpose and objectives are outlined. Specific teaching methods and learning activities are suggested. Discussion questions and possible student answers are included. The entire student booklet is duplicated in the guide. Teaching methods used include directed classroom discussions, small group activities, brainstorming, simulations and role-playing, and resource speakers. (RM)