Evaluating the effectiveness of college instruction is necessary and valuable in order to know which teaching practices should be continued. Although teachers usually are reluctant to be evaluated, some voluntarily seek methods of determining their classroom effectiveness. Four objective means of measurement are (1) introspection (questioning one's own teaching techniques), (2) classroom observation (inviting outsiders to observe one's class, or using tape recorders or other devices to monitor class), (3) product examination (studying changes produced in students), and (4) student evaluation (administering opinionnaires). Opinionnaires may be open-ended scales devised by teachers or specially prepared teacher-rating scales such as the Tau Beta Pi Instructor Rating Questionnaire. Factors involved in good teaching include, among others, (1) classroom atmosphere conducive to student ease, (2) a tolerant and approachable instructor who is competent and energetic, and (3) a course which has clearly defined objectives. In devising appraisal forms, allowances should be made for suggestions toward improvement rather than merely the recording of opinions. The forms should be distributed, monitored, and collected by students--not the teacher--and should not be read until final course marks have been submitted. (DG)