One of a series of units on business issues for high school students, this packet uses the example of hamburger wars ("price wars" between hamburger stands) to introduce students to the ways in which businesses operate in a competitive environment. A teacher's guide and student materials are provided in two separate sections. Following an overview of activities and objectives, the teacher's guide outlines daily lessons of reading, discussion, and activities. Also included are answer keys, recommendations for supplemental activities, teacher background information and discussion guides, and suggestions for using business professionals as classroom resources. In the student materials section, students are introduced to a variety of business practices such as price fixing, mergers, trusts, and monopolies, and their impact on business and the consumer. Business decision-making, business organization, and government regulation are also examined. A total of nine activities include fictional and real case studies of competition (hamburger companies) and legal disputes (American Telephone and Telegraph), readings on various types of business organization, a vocabulary worksheet, and an application exercise in which students choose actions that would violate anti-trust laws. (LP)