1. Some students lack motivation, consciousness, autonomous learning ability and participation, and can't keep up with teachers' ideas. After a long time, some children have developed the phenomenon of procrastination and weariness of learning, and can't attend classes on time.

2. Classroom supervision is difficult to fully implement. Teachers are not around, parents have to go to work, and no one is in charge, mainly relying on students' consciousness. Students can't get the answer whether they listen or not. Online learning has its limitations. At first, students are still in the stage of novelty and excitement, but they can also listen carefully. Over time, students lose their freshness and the effect of attending classes becomes worse.

3. Due to the large number of students who participate in online teaching, a considerable part of the dialogue and communication need to be transmitted through words, which takes a lot of time. How to finish the teaching task of a class in 30 minutes?

5. online work can't finish it in time, and the quality of the work can't be guaranteed.

Improvement measures:

1. Teachers should carefully design learning tasks including before class, during class and after class. Such learning tasks should be situational and challenging, so as to stimulate students' interest in learning, arouse their desire for learning, trigger their learning thinking, and make students feel that they are the main body of activities, and be able to operate these contents independently and take the initiative to carry out learning activities.

2. In order to attract every student to the virtual classroom, in addition to punching in and calling the roll, teachers should also strengthen students' sense of existence and control by checking and endorsing before class, commenting on lectures, asking questions in class, arranging exercises after class and answering questions in time, so as to enhance students' attention to online learning.

3. Correct the online homework teacher in time, record the excellent time for the children, give appropriate praise in front of the whole class, and set a sense of example. If the homework is not handed in in time or the quality of the homework is not high, we should also communicate with parents in time to solve it and do a good job in home-school co-education.

4. Teachers should communicate with parents, give timely feedback to parents on the completion of children's homework that day, and learn about children's learning at home. Once they find bad knowledge points, they can communicate with students one-on-one after class.