For example, the first volume of grade four: 1 100 million? What is the purpose of arranging this section in the textbook?

Textbooks attach great importance to the cultivation of number sense in the concept teaching of number. Let the students understand the meaning of numbers and establish their digital consciousness through their perception and experience of specific numbers. However, because the number 1 100 million is too large, it is difficult for students to get an intuitive feeling by combining specific quantities. Therefore, after the "understanding of large numbers" unit, this comprehensive application is arranged, so that students can experience the process of guessing, experimenting, reasoning and comparing through inquiry activities, and fully feel the number of 654.38 billion by using imaginary materials.

Another example: the second volume of senior two: 46 pages: cut it.

This part of the textbook is based on the traditional Chinese folk handicraft "paper-cutting" and designs two relatively simple paper-cutting activities. Through this activity, on the one hand, we can cultivate students' practical ability, on the other hand, we can cultivate students' initial thinking ability in images and logical thinking ability in the process of exploring laws. This activity, mainly through students' hands-on cutting, cuts out regular graphics, deepens the understanding of graphic translation and rotation, and feels the joy of learning and success, thus improving the interest in learning. The textbook also puts forward some enlightening questions for students to make simple reasoning by observing the formation of graphics in the process of paper-cutting. In addition, the textbooks also leave room for students to create. Students can design other patterns by themselves, give full play to students' imagination and creativity, and initially cultivate students' innovative consciousness.

It can be seen that the arrangement intention of comprehensive practice course is to help students comprehensively use existing knowledge and experience through a series of activities, and to solve challenging and comprehensive problems closely related to life experience through independent exploration and cooperative exchange, so as to develop students' problem-solving ability, deepen their understanding of "number and algebra", "space and shape" and "statistics and probability" and realize the close relationship between each part.

Second, clear the characteristics of the curriculum standard of Practice and Comprehensive Application

In order to teach the practical comprehensive course well, we must also make clear the characteristics of the practical comprehensive course. So what are the characteristics of the course "Practice and Comprehensive Application"?

1. "Practice and comprehensive application" should emphasize exploration.

"Practice and comprehensive application" is essentially a problem-solving activity. In the process of solving problems, students need to think independently and explore independently. Teachers should respect students' autonomy, let students master thinking methods in exploration and cultivate students' innovative thinking. It can be seen that practical activities are not only simple activities, but also methods to cultivate students' problem-solving ability through activities. Is to let students learn and grow in activities.