This competency-based preservice home economics teacher education module on marketing practices in relation to low income clientele is the third in a set of three modules on management in economically depressed areas (EDAs). (This set is part of a larger set of sixty-seven modules on the Management Approach to Teaching Consumer and Homemaking Education [MATCHE]--see CE 019 901-967.) Following the module objective and overview, three units of instruction are presented: (1) psychology of marketing and advertising in EDAs (with lessons on deceptive sales practices), (2) psychology of in-house sales (with lessons on door-to-door, phone, and mail-order sales), and (3) consumer-clerk relations. Each unit generally includes the following elements: objective, overview, and progress test. Lessons contain suggested activities and resources. A module pre/posttest (with answer key) concludes the document. (Workshop proceedings relating to the development of these modules are available in the ERIC system as CE 019 896-899; also available is a module on utilizing FHA-HERO as an instructional strategy to expand and strengthen the home economics instructional programs [CE 019 900].) (CT)