​ Basic Course Information​ Target Audience: Third-grade primary school students​ Course Objectives:​ Master the reading, writing, calculation and practical application of numbers within ten thousand;​ Understand the conversion and use of common units (length, mass, time);​ Recognize the characteristics of basic figures and master the method of calculating perimeter;​ Cultivate logical thinking, problem-solving ability and interest in mathematics learning.​ Total Class Hours: 60-80 class hours (40 minutes per class hour)​ Teaching Methods: Situational teaching, hands-on operation, group cooperation, game interaction