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引子:近期参加宝应县“荷韵杯”课堂教学比赛,20节自选课题中,6位教师执教二年级“认识角”一课,每节课教师都说到了“角的大小与边的长短没有关系”。听课过程中,我感觉到数学教师的专业素养还需进一步提高,也引发我整理小学数学教师常见口语“错误”的决心。错例1:角的大小与边的长短没有关系。分析因为角的边是射线,射线是向一方无限延
Primer: Recently participated in the Baoying County “Lotus Cup ” classroom teaching competition, 20 optional topics, 6 teachers coached the second grade “cognition angle ” class, each class teacher said “angle size Has nothing to do with the length of the side ”. During the lectures, I felt that the professional qualifications of math teachers need to be further improved, and also led me to make up my common primary language “errors” in elementary math teachers. The wrong example 1: the size of the corner and the length of the edge does not matter. Analysis Because the edge of the corner is a ray, the ray is unlimited to one side