Self-contained units of study on advertising will help secondary students to critically analyze the utility, completeness, and accuracy of various sources of product information. In the first of five units, students are asked to think about the many benefits consumers and producers derive from advertising. The second unit makes students aware that advertisements are only one source of data on goods and services available to the consumer and that purchasers do not always obtain all the information available to them. In the third unit students learn that there are costs other than the price charged for the goods and services which can be incurred when making a purchasing decision. The fourth unit involves students in analyzing six common advertising techniques. The concluding unit teaches students that as consumers they have power in the marketplace. Information provided for each unit includes teacher background information, the classroom lesson, and supplementary activities. Activities vary and involve students in participating in classroom discussions, brainstorming, listening to guest speakers, analyzing advertisements, discussing scenarios, and role playing. (RM)