I. Problem description

The Mathematics Teaching Syllabus for Nine-year Compulsory Education Full-time Primary School clearly points out in the Teaching Requirements that it is necessary to cultivate students' exploration consciousness through observation, operation and speculation, so that students can initially learn to use the mathematical knowledge and methods they have learned to solve some simple practical problems. The operation here is the operation of teaching AIDS and learning tools. Using the intuitive, visual and spatial characteristics of learning tools to help students master abstract mathematical knowledge is helpful to stimulate students' interest in learning, enable students to establish correct and clear concepts, and help cultivate students' thinking ability and innovative spirit.

However, in actual teaching, learning tools have not played a good role in learning. There are some problems: students will not be allowed to operate because they are afraid of classroom discipline disorder, which violates children's cognitive laws. Some of them are formal and superficial even if they are operated, so students simply don't give full play to their hands-on ability and don't give them enough space to use their hands and brains. Some people don't even know that the content in the class has corresponding learning tools, and they don't know it's useless until they finish it. Wait, it shows that we don't know much about the role of learning tools in teaching and don't pay enough attention to it.