Plan the course time according to different grades: the Municipal Education Bureau suggests that online teaching is not recommended in the lower grades of primary schools, but can be guided by teachers, and parents and students can choose to study independently; Each class in the middle and senior grades of primary school is 20 minutes, and the online education and teaching time every day is not more than 60 minutes in principle.

Each class in junior high school is 30 minutes, and the daily online education and teaching time should not exceed 120 minutes in principle; Each class in senior high school is 30 minutes, and the daily online education and teaching time should not exceed 180 minutes in principle. Grade three, grade three graduation can be appropriately extended according to the actual situation.

At present, the online class time of most primary schools in Changchun is about 20 minutes. Chen, a student in the experimental primary school attached to Changchun Jida University, has three online classes every morning, namely, Chinese class from 8: 40 to 9: 00, math class from 9: 30 to 9: 50, and English class from 10: 20 to 10: 40. Each class lasts for 20 minutes, with a half-hour break between classes.

Every afternoon is Chen's self-study time, and every night there is a teacher's question and answer time. For this kind of course rhythm, Chen's father thinks it is acceptable. "The rest time between two classes is quite long. I usually let my child look at the distance and urge him to do eye exercises. " Mr. Chen said.