This packet contains 13 teacher lesson plans with related student information, job sheets, and task sheets for a block of instruction on motor vehicle refrigeration (air conditioning) systems in a course on auto mechanics. Lesson plans, which are either informational or manipulative in format, take the teacher step-by-step through each lesson. Information provided includes the subject of the lesson, aim, teaching aids, materials needed, references, prerequisite experience of the learner, motivation, presentation of the information (with instructional points in the left column of the plan and related student and teacher materials in the right column), summary, evaluation, and suggested readings for the students. Student job and task sheets break down the students' duties into steps and note the types of equipment and other materials needed. Procedures are illustrated with line drawings. Information sheets are provided for information lessons. (KC)