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教学内容:苏教版小学数学二年级下册第86页例2和例3,第87页的“想想做做”教学目标:(1)使学生经历观察、操作、比较等活动过程,初步认识直角、锐角和钝角,会借助三角尺上的直角辨认直角、锐角和钝角。(2)使学生在认识直角、锐角和钝角的过程中,培养初步的比较,分析和推理能力,体会与他人合作交流的乐趣。教学过程:一、谈话引入孩子们,课前老师请大家收集了一些生活中有关角的图片,并把它们画在了纸上。现在请将角画在老师纸板上的孩子将作品贴到黑板上。观察一下,这些都是角吗?为什么?你能找到和这个叫
Teaching content: “Teaching and Learning” teaching objectives in Example 2 and Example 3, page 87: (1) To enable students to go through the process of observation, operation, comparison and other activities , A preliminary understanding of right angle, acute angle and obtuse angle, will use the right angle on the ruler to identify right angle, acute angle and obtuse angle. (2) To enable students to develop initial comparisons, analysis and reasoning skills in the process of recognizing right angles, acute angles and obtuse angles and realize the fun of cooperation and exchange with others. Teaching process: First, the conversation into the children, the class teacher invited you to collect some pictures of life in the corner, and draw them on the paper. Now, please draw the picture on the teacher’s board and attach the artwork to the blackboard. Look, are these horns? Why? You can find and call this