A prototype software program and accompanying user's manual were developed for teaching vocational English related to basic electricity/electronics to limited English proficient students. The software package was designed to be adaptable to other content areas. Preliminary activities included compilation of a list of learning objectives for and identification of vocational language related to basic electricity/electronics. The prototype computer-assisted instruction (CAI) vocational English-as-a-second-language program included 10 activities, 2 reading passages, and 2 cloze tests (pre and post). The lesson was programmed using Apple Pilot, and a user's manual with a guide for creating new CAI lessons was developed. The prototype was tested through external reviews and pilot testing. Following the eight-page narrative are appendixes that include a list of sources for the task analysis list, cross-referenced block of tasks, a task analysis list for basic electricity/electronics, various materials with vocational language related to basic electricity/electronics, a sample lesson outline, an evaluator's review of the prototype and manual, a student's review of the prototype, and a list of material and human resources. (YLB)