Fifteen units on office duplication practices are presented in this teacher's guide. The unit topics include the following: consumer mathematics, stock record control, paper characteristics and classification, immovable carriage typewriter, using the manual typewriter, written communications, clerical recordkeeping, petty cash, supplementary machines, measurement, layout, photocomposing, thermal process, master makers, and verbal and nonverbal communications. Each instructional unit generally contains eight components: performance objectives; an outline of minimum instructor and student activities to accomplish unit objectives; information sheets presenting basic unit content; transparency masters; job sheets which outline skills to be achieved; student assignment sheets related to the unit information sheets (answer sheets are provided); and objective tests with answer sheets. (CT)