A project was conducted for the following purposes: (1) to develop a workshop training package to prepare vocational education teachers to use vocational subject-specific modules; (2) to train those teachers to use the workshop package; (3) to conduct field tests of the metric modules with experimental and control groups; (4) to analyze, describe, and submit reports on the posttest results; and (5) to apply for Joint Dissemination Review Panel (JDRP) approval. Project staff worked in April and May 1983 with students and teachers in the Columbus, Ohio, Northwest Career Education Center to field test 5 of 55 existing metric educational modules in 77 vocational education areas. Students from preselected classes in auto mechanics, diesel mechanics, and merchandise distribution were randomly assigned to the experimental (36 students) and control (40 students) groups. The Statistical Analysis System program T test was used to examine the data collected. Comparing the raw scores of each category and then collapsing this data revealed that in the control group only 25 percent scored higher than 59, while in the experimental group 76 percent of the scores exceeded 59. A comparison of the means in the control and experimental groups demonstrated a significant difference and provided an overall picture of the effectiveness of the metric module. This study, while comparing groups drawn from a relatively small sample, indicates the instructional modules assessed were effective in imparting basic metric principles to the experimental classes. Replication of this study is recommended in enlarged control groups employing both pre- and posttest provisions to facilitate the assessment of gain rather than final conditions only. (KC)