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一、观片解题法初中学生心理特征是由形象思维过渡,抽象思维依靠形象思维支持的。他们喜欢直观形象,特别是对于动片更敏感。教学时,可根据新课标内容,对学生没有见过的现象运用投影进行模拟,启迪思维进而导入新课。例如在讲授初中化学第二章《核外电子排布初步知识》这节课时,教师运用两台投影仪模拟钠原子核外电子排布和运动情况。学生在投影银幕上看到钠原子核外离核最近一层排有2个电子,较近一层排8个电子,最远一层排1个电子,通过投影使学生直
First, the concept of solution problem The psychological characteristics of junior high school students is the transition from the image of thinking, abstract thinking to rely on the image of thinking support. They like visual images, especially for moving tablets. Teaching, according to the content of the new course, the phenomenon of students have not seen the use of projection simulation, enlightenment and then into the new lesson. For example, in teaching the second chapter of junior high school chemistry “preliminary knowledge of extranuclear electron arrangement” during this class, teachers use two projectors to simulate the atomic arrangement of sodium atoms and movement. Students on the screen to see the projection of sodium nuclei from the nearest row of two rows of electrons, the row of the next row of eight electrons, the furthest layer of an electronic row, through the projection so that students straight