This instructor's manual for workplace trainers contains the materials required to conduct a course in basic workplace mathematics skills. The course consists of six lessons for workers and two lessons for supervisors that discuss the following: concepts taught in the six lessons; workers' progress in the individual lessons; and strategies for helping workers continue to develop the basic math skills taught in the course. The following materials are provided for each course: lesson plan, learning activities based on real-life situations, handouts, assessments (including pretests and posttests), and transparencies. Each lesson plan contains objectives, a list of materials needed, classroom setup information, and detailed instructions for conducting all activities. The following topics are covered: using estimation and rounding techniques; converting from the English system of measurement to the metric system; using fractions and decimals; calculating rates, ratios, proportions, and percentages; and using calculators. (MN)