教师在课前应做好一切准备,包括分析教材,掌握教学目的和重点,结合学生水平,拟定教学方法,使学生将全部精力贯注到整个的实验中,注意仪器的装置及使用,同时还必须启发学生积极思维,从事物的表象进而掌握物质变化的本质,自觉地作出结论。这样才能达到大纲的要求和目的。“木材干馏”这节课我就根据这一原则来进行教材分析和讲解的,但由于个人水平的限制,可能存在很多的问题,希望老师们提出宝贵的意见。 (一)我对“木材干馏”这一节课的认识“木材干馏”这一节课是处在“燃烧的条件”和“缓慢的氧化和爆炸”之后;在“火焰”之前。当学生了解并掌握燃烧的条件后,会很容易的联系到由燃烧这种化学变化所引起的现象——火焰的生成。但物质燃烧时生焰与不 Teachers should make all preparations before class, including analyzing teaching materials, mastering the purpose and emphasis of teaching, combining the students’ level and formulating teaching methods so that students will concentrate on the whole experiment, paying attention to the installation and use of instruments and must also Inspire the students to think positively, to observe the appearance of matter and then grasp the essence of material change, and make a conclusion consciously. In order to achieve the outline of the requirements and purposes. According to this principle, I will analyze and explain the teaching materials according to this principle. However, due to the limitation of individual level, there may be many problems and I hope the teachers can give valuable opinions. (A) My Understanding of the Lesson on Wood Drying Lessons on wood dry distillation are after “burning conditions” and “slow oxidation and explosion”; before “flame.” When students understand and grasp the conditions of combustion, it is easy to relate to the phenomenon caused by such chemical changes of combustion - the generation of flames. However, when the material burning flame and not burning