"Good teaching" is notoriously difficult to measure. It may be possible, though, to say where a teacher stands on a scale of development which has four stages. In the first stage, the authority is the teacher, and the student gives back rote responses. In the second stage, the authority is the text or syllabus, and the student asks questions only to clarify the assignment or get a fact. In the third stage, right answers are derived from evidence rather than the text, and the student begins to discuss and ask thoughtful questions. In the fourth, the student decides for himself what the authority is and spends his time in individual work. Questions which may gauge the stage of development of a teacher include how much the teacher talks, what kind of questions he asks, what kind of questions the student asks, what kind of study materials are used, how closely the teacher follows the lesson guide, if any, and how many topics refer to the student's own environment. (JK)