“用量角器度量角的度数”是苏教版数学第七册第二单元“角”的第三课时,它是在第一学段直观认识角的基础上安排的,是“角”这一单元教学中的一个难点,同时也是小学数学教学中的难点。本课时的教学重点是帮助学生掌握使用量角器量角的正确方法,需要突破的教学难点则是正确读出角的度数。在实际的教学活动中,鉴于对本课时重要性的认识,我精心做了准备,不仅认真研读了教材,而且还观看了一些名师的教学视频。但意想不到的是,教学效果并不理 “The degree of angle measurement angle with the protractor ” is the third class of the second unit of the seventh edition of the mathematics of the Sujian edition, which is arranged on the basis of the first stage of the visual angle of understanding, is “ Corner ”This unit teaching a difficult point, but also difficult in primary school mathematics teaching. The focus of this lesson is to help students master the use of protractor angle of the correct method, the need to break the teaching difficulty is the correct reading angle degrees. In the actual teaching activities, in view of the importance of this lesson awareness, I carefully prepared, not only carefully read the textbook, but also watched some of the teacher’s teaching video. But unexpectedly, teaching does not care