This companion document to the instructor's guide for a course designed to prepare employees for statistical process control (SPC) training given at their workplace by refreshing math skills and building the concepts and vocabulary necessary to understand SPC in manufacturing environments. SPC-Prep 1 addresses the math skills necessary to perform SPC calculations. The manual provides materials on these topics: math memories; keeping track of learning; math operations; place value; rounding off numbers; finding an average; decimals; and positive and negative numbers. Information sheets and exercise sheets are provided. A word list and answer key for the exercises are provided. (YLB)