Content: The key to reduce students' schoolwork burden and improve classroom teaching efficiency. It is the key to improve the quality of 40 minutes. Teachers' classroom teaching must be carefully designed, and grasping several points in the classroom is the key. 1, the principle of classroom teaching should reflect teaching as the leading factor and learning as the main body. Teachers and students should interact in class and don't move. In teaching, teachers should give students appropriate inspiration, really play a leading role, always mobilize students' learning enthusiasm, guide students to actively participate in the whole process of teaching, and give full play to students' main role. 2. Classroom teaching methods should be flexible and comprehensive. Teachers should start from teaching practice, and no matter what teaching methods are adopted, they should have clear goals and comprehensive plans. Because the time of a class is limited, it is not good to use more auxiliary tools, but to be just right, less but better, and never engage in ostentation and extravagance. 3. Pay attention to the guidance of students' learning methods in the classroom. In classroom teaching, teachers should not only try to let students learn knowledge, but also let students learn how to learn. "Send mermaid, just for a meal; Teach people to fish and use it for life. " 4. Classroom teaching should be geared to all students. In the classroom, we should determine different requirements according to different objects, choose different contents and methods, strive to make every student participate in the whole process of teaching, strive to make every student understand and master what he has learned in the classroom, strive to satisfy the knowledge of gifted students, take care of the progress of underachievers, and never make up for the losses in the classroom. 5. Grasp the feedback information of classroom teaching in time. Teachers can't help but know whether students have mastered the knowledge they have learned, so it is necessary to feedback teaching information in time in teaching. There are many ways to get feedback, and the most important thing is classroom work. Teachers can patrol and check students' homework in class. You can also ask questions or students do it, get feedback in time and correct students' misunderstanding, and adjust classroom teaching methods and means in time until students understand and master them. 6. We should allocate time reasonably and optimize the classroom structure. Some teachers have no concept of time in class and go wherever they go. If the content that should be completed in a class is not completed, it is not appropriate to extend the class hours or teaching hours and complete all the content alone, which will reduce the teaching efficiency and artistry. Therefore, in order to improve classroom efficiency, effectively reduce the burden and increase efficiency, teachers should grasp the time structure of a class and optimize the classroom structure. By doing the above in classroom teaching, the teaching effect can be doubled with half the effort, students' psychological and academic burdens can be reduced, their interest in learning can be improved, their learning efficiency can be obviously improved, and their ability can be obviously enhanced. Therefore, do a good job in each class and improve the efficiency of classroom teaching.