This paper addresses the training of health workers to become more effective communicators and teachers in third world countries. The first part introduces the health worker to the traditional medicine and cultural beliefs of third world people. Part two on educational psychology deals with helping the health worker manage people's resistance to change, and how to persuade and motivate people to change unhealthy behavioral practices. The third part focuses on creating a positive learning climate, familiarizing the health worker with how to show people a remedy is harmful without offending them, and on how to help people understand new ideas. A variety of teaching methods and aids for the health worker to use is discussed in the fourth part. The final part gives several important reasons for health workers to evaluate the health program and teaching, explains the four basic elements that should be evaluated, and puts the four different types of evaluation into "time" categories. (Author/JD)