This module, one of 25 on vocational education training for careers in environmental health occupations, is on using modules in an environmental health training program. This informational document describes the prospective student, content and objectives of the modules, and how to select modules for use in an environmental health training program. An introductory section discusses expanding roles in the environmental health field and how module topics were selected. In the section titled "Description of the Self-Instruction Materials," various program areas are presented: acoustics (noise control), air pollution, occupational health/ventilation, radiation, sanitation, and water/wastewater. Also in this section is a catalog of modules. The description of each module includes module title, objective, sample graphics depicting the subject of the instruction, training prerequisites, and lesson objectives. References are appended. (CT)