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[教学内容]:第八册四年级《角的认识》第一课时[教学目标]:1.引导学生进一步认识线段,认识射线和直线,知道三者之间的联系和区别。2.让学生认识角和角的表示方法,知道角的各部分名称,明确角的大小及直接比较大小的方法。3.通过观察、比较和概括,初步培养学生关于线段、射线、直线和角的空间想象观念,以此来感受数学的深奥和数学魅力。
[Content]: The eighth grade fourth grade “understanding of the angle” The first lesson [teaching objectives]: 1. To guide students to further understand the line, ray and line of understanding, to know the relationship between the three and the difference. 2. Let the students know the angle and angle representation, know the name of each part of the angle, determine the size of the corner and directly compare the size of the method. 3. By observing, comparing and summarizing, we can cultivate students ’esoteric and mathematical charm through the preliminary training of students’ imagination of space, ray, line and angle.