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教学内容义务教育课程标准实验教科书《数学》四年级上册第37页到38页《角的度量》。教学目标1.使学生在观察、交流的基础上,认识量角器的结构与功能,通过自己的探索、实践,总结出用量角器量角的方法,初步学会用量角器量角。2.使学生在学习过程中体会统一角的计量单位的需要,认识角的计量单位,建立1°角的表象;能通过量角,建立角的大小的量化观念,感受角的大小与所画边的长短无关。
Teaching content compulsory education curriculum standard experimental textbook “Mathematics” grade four volumes page 37 to 38 “measure of angle.” Teaching Objectives 1. To enable students to observe the structure and function of protractor on the basis of observation and exchange. Through their own exploration, practice, summed up the method of measuring protractor angle, and initially learned how to use protractor angle. 2. To enable students to understand the unity of the angle during the learning process unit of measurement needs to understand the angle of measurement units, the establishment of the 1 ° angle of the image; through the angle of view, the establishment of the size of the angle of the quantitative concept of feeling the size of the angle and the painting The length of the edge has nothing to do.