This competency-based preservice home economics teacher education module on the metric system is the seventh in a set of seven modules on consumer education related to management. (This set is part of a larger series 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, two units of instruction are presented: (1) understanding the metric system (with lessons on the history of the metric system, reasons for changing to metric, and metric terminology) and (2) weights and measures of the metric system (with a lesson on working with the metric system). Each lesson includes a narrative summary, suggested activities, and suggested resources (readings). 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].) (JH)