Mathematics Curriculum Standard for Compulsory Education points out: "Mathematics teaching should be closely related to students' living environment, and based on students' experience and existing knowledge, create a teaching situation conducive to students' independent learning and cooperative communication, so that students can learn mathematics in vivid and concrete situations. "Every section of the primary school mathematics textbook published by Beijing Normal University provides us with a rich teaching situation. On the one hand, teachers should give full play to the teaching function of these situations, on the other hand, they should realize that the situations provided by textbooks have certain limitations and cannot be suitable for all students. As a teacher, we should have a certain sense of innovation and design personalized and effective teaching situations in combination with the reality of local and class students. Let's talk about how to create an effective teaching situation in mathematics classroom with teaching cases. There are many kinds of classroom situations. In my classroom teaching, the common methods are as follows.

First, create a story situation to stimulate students' interest

Junior students are very interested in stories and never tire of hearing them. Therefore, creating situations in the form of telling stories will make students devote themselves to teaching activities. Mathematical stories and mathematical allusions sometimes reflect the process of knowledge formation and sometimes reflect the nature of knowledge points. Creating problem situations with such stories can not only deepen students' understanding of knowledge, but also improve students' interest in mathematics and aesthetic ability. For example, when talking about "higher scores", the story goes like this: the master and the apprentice each have a watermelon, and Wukong said, "To be fair, we should each have a quarter." As a result, the pig said, "I want to eat more." I want to eat a sixth or at least a fifth. " Wukong cut a sixth and gave it to Bajie. He even said, "Fool! Fool! " Why is this? A vivid story creates the best mathematical situation and gives students a vivid understanding of the size of the score.

Second, create life situations and promote students' participation

Mathematics comes from life, and there is mathematics everywhere in life. Learning mathematics is to explain and solve problems in life. Therefore, in teaching, expanding the time and space of teaching situation will enable students to learn independently out of the classroom and enter the next new starting point. When faced with new mathematical knowledge again, they can actively find its actual background and explore its application value.

Third, create problem situations to stimulate students to explore independently.

Problem situation is the driving force to promote students to build a good cognitive structure, and it is an important measure to experience the application of mathematics and cultivate innovative spirit. The research of thinking development psychology also shows that the development of children's thinking is a process in which external activities are transformed into internal activities.