Before vocational instructional products are adopted for statewide dissemination in South Carolina, they must undergo a field test. An effective field test design incorporates collection of data about the instructional products, the students, and the teachers who use the products. The design of a control group and an experimental group compares learners who have used the new materials with those who have not. Five basic field test data collection methods are tests and performance measurement instruments, classroom observation scales, interview schedules, student and teacher questionnaires, and existing records. An evaluative report is prepared after data are analyzed through an item analysis, group descriptive statistics, comparison of pre- and post-scores, comparison of performance of control and experimental groups, and determination of teacher effects. (A chart is provided that lists the components and responsible party.) (YLB)