“‘酸’对大家来说一定不陌生。食醋有酸味是因为食醋中含有醋酸;一些水果有酸味是因为水果中含有果酸……”这是我校九年级某班化学课堂上传出来的声音。讲解者眉飞色舞、振振有词,聆听者全神贯注、积极思考,不时还有一些问答与质疑。课堂氛围和谐融洽,学习活动充满着探究与合作的快乐气息。然而,站在讲台上的授课者不是教师,而是我们的学生。这是怎么回事? ’’ Acid ’for everyone is no stranger to. Vinegar sour is because vinegar contains vinegar; some fruit sour is because the fruit contains acid ... ... "This is a ninth-year class in our school chemistry class Uploaded out of the sound. Instructors enraptured, full of vibrations, the listener full attention, positive thinking, from time to time there are some questions and answers and questions. Harmonious classroom atmosphere, learning activities are full of happy atmosphere of exploration and cooperation. However, the lecturer standing on the podium is not a teacher, but our student. How is this going?