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运用电教手段进行教学,是当前生物课改革的一个重要课题。根据高中生物学第一册教材安排,心脏结构一节教学内容在教学后面,而血液循环一节教学内容在教材前面,这样安排在不了解心脏结构情况下是不能很好完成血液循环教学任务的。然而运用电教手段,即教学时安插教学电影,板书提纲用投影仪,再加实物精心观察,把二节课内容合并为一节课上完,从而收到较好的教学效果。具体做法如下: 一、课前准备工作1、选出与教材有关的电影片断多次试映电影教学片,循环系统三部片子放映时间共一个半小时,从中精选出既能突出重
Teaching by means of audio-visual education is an important issue in the current biology curriculum reform. According to the textbook of high school biology teaching arrangement, the heart structure of a teaching content behind the teaching, and blood circulation teaching content in front of the textbook, arranged in this way do not understand the heart structure is not good to complete the task of blood circulation teaching . However, the use of audio-visual means, that is, teaching instructional films, plankton outline projectors, coupled with in-kind observation, the two lessons into one class finished, and thus receive better teaching results. The specific practices are as follows: First, preparatory work before class 1, selected with the teaching of the movie pieces repeatedly test movie teaching films, circulatory system three films show a total of one and a half hour time, from which both outstanding selection