The circular score model is an intuitive teaching tool for primary school mathematics classrooms, consisting of a 20 centimeter diameter disk and detachable magnetic fan-shaped pieces such as 1/2, 1/3, 1/4, 1/6, and 1/8. Color shards can be rotated and combined to visually display true, false scores, and concepts with scores; Overlay demonstration of the process of calculus, divisor, addition and subtraction operations. The transparent chassis can be overlaid on paper for drawing, helping students establish the connection between "Unit 1" and partial quantities during operation, helping them understand the nature of fractions and operational logic, and developing numerical and geometric thinking.