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低年级学生的思维以具体形象思维为主,在数学学习中常常需要借助具体形象完成思维过程。而动手操作是帮助低年级学生认识、理解和掌握数学知识,积累数学活动经验,发展数学思考的重要途径之一。《认识直角》教学中,通过“循序渐进、细心论证、用好媒介”三种策略,保证了学生动手操作的有序、精确、科学。
The thinking of the lower grade students is based on the concrete image thinking. In the mathematics learning, it often takes the help of the concrete image to complete the thinking process. The hands-on operation is one of the important ways to help lower-level students recognize, understand and master mathematical knowledge, accumulate experience of mathematical activities, and develop mathematical thinking. In the teaching of “cognition right angle”, the three strategies of “step by step, careful argument and good media” ensure the orderly, precise and scientific operation of students.