The score problem demonstrator is an intuitive tool for assisting score teaching, consisting of detachable circular, square, and other sections, each divided according to different scores, such as 1/2, 1/3, 1/4, etc., with magnetic attraction function that can be attached to the whiteboard. In teaching, demonstrate the meaning, size comparison, addition and subtraction of fractions by splicing or splitting sections, and master knowledge related to fractions. Being able to transform abstraction into concreteness, it helps students understand the concept and logic of fractions, suitable for introductory teaching of fractions in primary and secondary schools, and enhances mathematical thinking and hands-on abilities.