This paper analyzes the responses of 50 practicing business managers who were asked to identify the most troublesome communication situations experienced by supervisors in their organizations. The authors put the responses in rank order according to two popular management systems, Management by Objectives (MBO) and Organizational Behavior Modification (OBMod), and draw the following conclusions: Teachers of management students should stress communication skills needed for motivating people, delegating authority, listening, giving directions, and group problem solving. Students who will work in OBMod systems need to learn communication skills for handling grievances, while those students entering MBO systems need skills for private, one-to-one conferences. The study also concludes that teachers should not increase their emphasis of public-speaking skills. (RL)