【背景】在我校科学教研组组织的关于课堂有效性的学习中,听了组里一位老师的“如何提高课堂有效性”的讲座。他指出了现在较为普遍的一种课堂教学现象:教师教得辛苦,但学生却没有得到应有的进步和发展,存在教学效果差、效率低的问题。听了之后,我感触颇多。我常常反思自己:“什么样的课堂教学才是有效的?”“我能做些什么提高我的教学效果?”结合七年级上第四章第二节液化两次教学案例,我有了更深刻的思考。 【Background】 In our study on the effectiveness of classroom organized by the science teaching and research group of our university, I listened to a lecture entitled “How to Improve Classroom Effectiveness” by a teacher in the group. He pointed out that the phenomenon of classroom teaching, which is now more common, is that teachers teach hard but students fail to achieve the progress and development they deserve. There are problems of poor teaching efficiency and low efficiency. After listening, I feel a lot. I often reflect on myself: “What kind of classroom teaching is effective? ” “” What can I do to improve my teaching effectiveness? "Combined with the seventh grade fourth chapter second liquefaction two teaching cases, I have a deeper thought.