A guide to good lecturing is presented for medical school teachers. It is suggested that the first step in encouraging active listening is to fulfill a clearly stated purpose. The lecturer is advised to ask the following questions: What is the listener supposed to know as a result of the lecture? What is the listener supposed to feel, value, or believe? What is the listener supposed to do with this knowledge and feeling? Attention is also directed to setting ground rules for audience participation and techniques to attract the student's attention at the beginning of the lecture (e.g., stating the purpose, telling an anecdote, posing a dilemma, asking a question). It is recommended that the lecturer both preview the structure of the lecture and follow the pre-established outline, since routinization of the lecture makes spontaneity possible. Additionally, the following teaching techniques are discussed: questioning, brainstorming, demonstration, and audiovisual aids. Finally, speaking skills are also considered. An observation tool is appended that includes the following: organization of the subject, teaching techniques, and speaking skills. (SW)