Qi Le Mathematics is a set of mathematics upgrading courses based on the characteristics of children's brain development and guided by the theory of "personalized teaching system". Let the children take the initiative to observe and think about the illustrations and examples in the textbook, and use graphics to reason the laws in the topic. When children encounter problems in the learning process, teachers will give targeted guidance and explanations. On the one hand, let children develop the habit of active observation, active thinking, independent learning and independent operation; On the other hand, according to children's individual differences, teaching students in accordance with their aptitude can cultivate children's good habits of learning and being willing to explore.