一、疑难类问题二次设计的缘由高中化学教材中有很多中外科学家的图片及他们的事迹,利用这些材料可以在化学课堂中渗透德育教育。“由氯化钠制备碳酸钠侯氏制碱法”中,一次设计为:教师与学生一起解读侯氏制碱法的原理,运用史料(提到了氨碱法没有作展开)鼓励、培养学生的爱国之心。与学生的交流中,发现大部分学生感受不深,课后一学生问:“老师,那个发明氨碱法的科学家是哪国人?”学生的话触动了我,让我意识到对教材运用不透彻, First, the reasons for the difficult problem of secondary design High school chemistry textbook there are many Chinese and foreign scientists pictures and their deeds, the use of these materials can be infiltrated in the chemical classroom moral education. “Sodium carbonate from sodium chloride Hou’s system of production of ”, a design as follows: teachers and students together to interpret the principle of HO’s alkaline method, the use of historical materials (not mentioned ammonia ammonia method) to encourage and train Patriotism of students. Students and students found that most students do not feel deep, after class, a student asked: “teacher, that invented ammonia-scientifically which country?” "Students touched me, let me realize that the use of teaching materials Incomplete,