学起于思,思起于疑。课堂教学中,设置悬念是重要的教学手段之一,它被贯穿于教学过程的各个环节中,是师生双边活动的重要纽带,是教学过程落实、提高、推进和发展三维教学目标的重要动力,是师生思想交流的重要方式之一。有的教师认为设置悬念是一种文学技巧,与化学教学关系不大,其实不然。悬念是课堂教学的重要技巧。在化学教学中设置悬念,就是对一些正在研究、发展中的新课题,教师不匆忙作出结论,而是创设一个悬而未决的教学情境,叫学生欲答不能,欲罢不忍,旨在激发学生的求知欲和创造欲,从而引导学生主动“探求、考虑、发现、推断”。所以,悬念式教学法,既能使教学内容产生巨大诱惑力而吸引学生的注意,增强教学艺术感染力,又能有效地激活学生的智力,点燃多种思维特别是发散性思维的火花。更重要的是,在破悬揭答的过程中,他们由当初问题的摸索者成为后来问题的驾驭者,角色的转换将使他们看到自身的力量和智慧,从而形成一种自尊和自信的心理素质。当新的问题出现时,他们不再畏惧和胆怯,先前的成功体验会呼唤出探索的力量和动力。自然地,探索更富于成效。 Learn from think, think of doubt. In classroom teaching, setting suspense is one of the most important teaching methods. It is permeated through all aspects of the teaching process and is an important link between teachers and students in bilateral activities. It is also an important driving force for the teaching process to implement, improve, promote and develop the three-dimensional teaching objectives , Is one of the important ways of teacher-student exchange of ideas. Some teachers think suspense is a kind of literary skills, and chemistry teaching is not much, it is not. Suspense is an important skill in classroom teaching. Setting suspense in chemistry teaching is a new subject that is under study and development. Teachers do not rush to conclude, but create an outstanding teaching situation so that students can not answer their questions. Desire and creative desire, so as to guide students to take the initiative to “explore, consider, discover, infer ”. Therefore, the suspense teaching method not only makes the teaching content have a great temptation to attract students ’attention, enhance the appeal of teaching art, but also effectively activate students’ intelligence and ignite a variety of thinking, especially the spark of divergent thinking. More importantly, during the process of breaking and reproaching, they become masters of later problems from the flotators of the original problems. The conversion of roles will enable them to see their own strength and wisdom, thus forming a kind of self-esteem and self-confidence Psychological quality. As new problems arise, they no longer fear and cowardly, and previous successful experiences call for the power and motivation of exploration. Naturally, exploration is more productive.