2006年9月下旬,我市举办了两年一度的全市青年物理教师优质课评选活动.笔者作为评委之一,全程听、评了23位初中教师的参评课,其中有12位的课题是人教版《平面镜成像》.在课堂教学中,教者大都引导学生探究平面镜成像的规律,不少学生依据自己照镜子的经验提出了这样的猜想:物离平 In late September 2006, the city organized the bi-annual youth city physics teacher quality class selection activity. As one of the judges, the author listened to and commented on the participation of 23 junior high school teachers, including 12 subjects. The teaching version of “Plane Mirror Imaging”. In classroom teaching, most of the teachers guide students to explore the laws of plane mirror imaging. Many students put forward such conjectures based on their own experience in looking into the mirror: