These two vocational instructional modules on basic automobile ignition timing and on engine operation, four-stroke cycle, are two of eight such modules designed to assist recently arrived Arab students, limited in English proficiency (LEP), in critical instructional areas in a comprehensive high school. Goal stated for this module is for the student enrolled in automobile courses to learn the correct basic ignition timing of an automobile engine and to explain the operation of the automobile engine during the four-strokes of the operating cycle and to identify the various parts of the engine. Each module consists of these parts: title; program goal and performance objectives; a pronunciation key; a language page which offers the pronunciation, definition, and usage of key terms in English and in Arabic; a pretest; bilingual (English and Arabic) language (vocabulary and usage) activities; evaluation; pretest and activity answer sheets; and a list of supplementary materials and their location. For each activity the objective, a list of materials needed, procedure, and evaluation are provided in addition to the necessary activity sheets or pages. Each module contains three activities. (YLB)