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针对初三学生的心理特点,笔者在教学中归纳出导入新课的七种类型,颇受学生欢迎.一、激趣型 兴趣是入门的向导,学习的动力.可运用新颖神奇的演示实验、引入深思的发问、妙趣横生的游戏、引人入胜的故事等作为新课导入的手段.如,在初中化学绪言课教学时,教师可首先演示蓝瓶子实验.面对幻影般的现象,学生感到化学奇妙无穷.这时教师可面带微笑引入课题.又如讲置换反应,以锌与硫酸化学反应为例,请三位学生上讲台分别用手拿着贴有彩纸剪成Zn、H_2、SO_4字样的牌子,按顺序排成一行.随着教师一声“反应开始”,三位学生按规定迅速交换各自位置.学生在欢声笑语的游戏中对置换的涵义有了初步的认识,很自然地导入新课.
In response to the psychological characteristics of the third grade students, the author summarized seven types of introduction of new classes in teaching, which are popular among students. First, interest in stimulating interest is the guide for entry and motivation for learning. It can use novel and magical demonstration experiments, Introducing thought-provoking questions, fun games, and engaging stories as a means to introduce new lessons. For example, when teaching junior high school chemistry lectures, teachers can first demonstrate the blue bottle experiment. In the face of the phantom phenomenon, students feel the chemistry is amazing. At this time, the teacher may introduce a topic with a smile. Another example is the replacement reaction. Take the chemical reaction of zinc and sulfuric acid as an example. Please ask the three students to use the placards cut into Zn, H_2, and SO_4 stickers on the podium. , In line with the order. With the teacher uttered a “response to start,” the three students quickly exchange their positions according to regulations. Students in the game of laughter have a preliminary understanding of the meaning of the replacement, it is natural to introduce new courses.