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教学内容:人教版《义务教育教科书·数学》四年级上册第40-41页。教学目标:1.认识角的度量单位,了解量角器的构造特点,掌握量角方法,正确地读写角的度数。2.经历量角器的形成和量角方法的探索过程,感受量角的意义,发展度量意识。3.通过观察、思考、探索、反思等数学活动培养学生的创新意识和实践能力。教学重、难点:掌握量角的方法及要领,了解并尝试理解量角器的构造原理及特点。
Teaching content: PEP “compulsory education textbook mathematics” fourth grade on the first 40-41 pages. Teaching Objectives: 1. Know the unit of measure of angle, understand the structure of protractor features, grasp the amount of angle method, correctly read and write the degree of angle. 2. Experiencing the formation of protractor and the exploring process of measuring method, the meaning of measuring the measuring angle, and developing the measurement consciousness. Through the observation, thinking, exploring, reflection and other mathematical activities to cultivate students’ innovative awareness and practical ability. Teaching heavy, difficult: Grasp the method and essentials of the angle, understand and try to understand the construction principle and characteristics of the protractor.