This handbook provides a short, simple, non-academic, and practical guide on instruction in an on-the-job setting. It teaches job instructors the skills, knowledge, and techniques necessary to carry out job training in vocational and technical areas. Part 1 focuses on elements present in the job instruction setting that must be weighed to maximize learning--training process, learning process, mechanics of learning, learner, and job instructor. Part 2 discusses communications, motivation, and human relations factors relevant to the job instructor. Part 3 presents 10 principles of good job instruction and discusses how they lead to the step-by-step process of job training. Part 4 is an overview of instructional methods, techniques, and aids. Each method is defined, and advantages, disadvantages, uses, and standard format are provided. Part 5 describes aids that could assist instructors in a wide range of vocational training tasks. The focus of part 6 is how to tackle job instruction in a logical manner. Topics are preparation, job breakdowns, training task breakdowns, and attitudinal training. Part 7 discusses the best methods of confirming that the learner has met the desired standard and basic reporting and recording requirements. (YLB)