The purposes of the study were to develop self-instructional materials for teaching selected business terms to college students, to determine the effect of using these materials as compared to the effect of using a lecture notebook teaching technique for instruction in business vocabulary and to no instruction in business vocabulary, and to compare the effect of using the lecture-notebook teaching technique to no instruction in business vocabulary. Four conclusions were drawn from the statistical findings from this experiment. (1) Specific instruction in business vocabulary by either of the two teaching approaches used in this experiment is more effective in increasing the business vocabulary of college business communications students than no instruction. (2) When total groups including all levels of business vocabulary knowledge are considered, the self-instructional materials are more effective than the lecture-notebook technique. (3) For students with a high initial knowledge of business vocabulary, one of these techniques is not more effective than the other. (4) The self-instructional materials used in this study are particularly effective for teaching business vocabulary to students who have a low initial knowledge of business vocabulary.