Examined is the effectiveness of a method of teaching the metric system using the booklet, Metric Supplement to Mathematics, in combination with a physical science textbook. The participants in the study were randomly selected undergraduates in a non-science oriented program of study. Instruments used included the Metric Supplement to Mathematics and McFee's Metric Test. Three one-way analysis of variance tests were used to determine significant differences between groups on the proficiency section, intuitive section, and the overall test results. The ability of the students to think in metric measures was significantly improved by using the booklet. Students learned metric units within a short period of time. (Author/EB)