One of two publications developed to facilitate bilingual vocational training, this handbook is intended to assist instructional materials developers and teachers in designing or adapting existing materials for selected-language speakers and vocations. (CE 019 070 contains a guide for assisting decision makers in determining priorities for development of materials needed for bilingual vocational training programs.) This handbook has been divided into five sections. The first section contains a single instructional unit (taken from a seventy-five-unit Nursing Assistant course) which was selected to illustrate the developmental process and to serve as a model for producing similar units. This model unit contains vocational exercises, vocational English pattern practice drills, and special bilingual vocational exercises. A detailed explanation of the process used in developing the model unit is found in the second section. In addition to explaining the basic concepts related to materials development, section 2 describes the vocational and English language materials used in the unit, emphasizing the way integration of the two was achieved. Special suggestions are included for the development of bilingual vocational exercises which effectively combine the vocational, English, and native language of the course. Section 3 provides a list delineating the step-by-step procedure to be followed in developing a unit. Section 4 provides additional vocational English exercises for beginning units, and section 5 explains transitional approaches for advanced units. A checklist for assessing the adequacy of materials is also provided. (BM)