初中化学的复习涉及知识面比较多、比较杂,进行有对比性、相关性的专题复习是很有必要的。但以往较为传统的专题复习课,即使上的比较到位,有些学生还是对已有知识的应用比较欠缺。因而如何真正意义上好化学复习课,使学生对知识的应用能力进一步提高,显得尤为重要。为此,我借学校教学周活动中应用“三疑三探”教学模式上了一堂《常见气体的制备》复习的展示课,力求从课堂教学的结构性变化来尝试改进专题复习课。教学过程:1、课堂导入:(猜一猜)教师:(PPT显示谜面)谜语1:人工降雨的功臣,灭火的先锋,制造碳酸饮料的原料,大棚蔬菜的养料。谜语2:无影无形摸不着,火焰见它跳的 Junior high school chemistry review involves more knowledge, more complex, there are comparative, relevant topics review is necessary. However, in the past, the more traditional thematic review classes, even though the comparative study was in place, some students still lacks experience in using existing knowledge. Therefore, it is particularly important for us to do a good job of chemical review classes in a real sense so that students’ ability to apply knowledge can be further enhanced. For this reason, I took the demonstration class of Review of Preparation of Common Gas by applying the teaching mode of “three suspects and three detections” in the school teaching week activity, and tried to improve the special review class from the structural change of the classroom teaching. Teaching process: 1, the classroom into: (guess) Teacher: (PPT riddle) Riddle 1: The hero of artificial rainfall, the pioneer of fire fighting, manufacturing carbonated drinks raw materials, greenhouses vegetable nutrients. Riddles 2: Shadowless invisible, the flame to see it jump