1、教师的角色变成了单纯的"网络主播"。由于老师多数是初次接触线上授课

1. The role of the teacher has become a mere "network anchor". Since most of the teachers are first contact with online teaching, the use of the platform is in the groping stage. The role of the teacher has become a simple "anchor". In many cases, the teacher alone is speaking, the students are listening, and there is no teacher-student interaction for on-site teaching. Even if the teacher speaks vividly, the students will become tired after watching for a long time, and the teaching effect will be greatly reduced. <br>2. Lack of effective management and control of students. Because there is no on-site teaching, the teacher can’t restrain the students. If the students’ self-discipline ability is poor, they are unable to concentrate when listening to the class, play games, listen to music, read novels, send messages, or even leave the class halfway. Unable to stop it in time, such teaching effects are bound to be poor. <br>3. Insufficient learning atmosphere in online teaching classrooms. Online teaching teachers cannot patrol the classroom, face the learning status of students intuitively, and cannot conduct on-site Q&A or group discussions. The interaction and communication between teachers and students, and between students and students is far less effective than on-site teaching. This kind of classroom seems cold, without the kind of enthusiastic learning atmosphere in the classroom. <br>4. The teaching effect cannot be effectively guaranteed. In the process of online teaching, students lack on-site guidance from teachers, and teachers cannot find out the problems of students in time and give guidance in time. Students are prone to detours. At the same time, the feedback after class is not effective. The instructor assigns online homework and requires students to submit it in time. However, students' homework is easy to be perfunctory, plagiarized, and use search software to complete tasks. Such after-class feedback is invalid. Teachers Nor can they find problems and make adjustments in time through student work. <br>5. Great influence on students' eyesight. Online teaching uses computers, mobile phones and other equipment to teach, posing a threat to students' vision health. Especially for middle and high grade students, all subjects are taught online, which means that students have to be in front of a computer or mobile phone for at least 6 hours a day, which will have a negative impact on vision and even physical health.

1, the role of teachers into a simple "network anchor." Because most of the teachers are the first contact online teaching, for the use of the platform in the groping stage, the role of teachers into a simple "host", many times are the teacher alone, students are listening, lack of on-site teaching interaction between teachers and students, even if the teacher said painted, but students will be tired after watching for a long time, teaching effect greatly reduced.<br> 2, lack of effective control over students. Because there is no on-site teaching, teachers can not restrain students, if students' self-restraint ability is poor, listening to the class attention is not focused, the appearance of playing games, listening to music, reading novels, sending messages, and even the phenomenon of leaving the classroom in time, can not be stopped in time, such teaching effect is destined to be very poor.<br> 3, online teaching classroom learning atmosphere is insufficient. Online teaching teachers can not patrol in the classroom, can not intuitively face the learning status of students, but also can not carry out on-site questions and answers or group discussions, between teachers and students, students and students between the interaction and exchange is far from the field teaching effect is good, such a classroom appears cold, there is no classroom that kind of warm learning atmosphere.<br> 4, teaching effectiveness can not be effectively guaranteed. In the process of online teaching, students lack on-site guidance from teachers, teachers can not find out the problems of students in time and make guidance in a timely manner, students easy to take detours. At the same time, after-school feedback effect is poor, the teacher assigned online homework, requiring students to submit in a timely manner, but students after-school homework is easy to perfunctory, plagiarism, with the help of search software to complete the task, such after-school feedback is invalid, teachers can not find problems and make adjustments through student homework in a timely manner.<br> 5, the impact on students' vision is great. Online teaching application of computers, mobile phones and other equipment to teach, students' vision health is a threat. In particular, middle and senior students, all subjects are taught online, which means that students have to computer or mobile phone at least 6 hours a day, which will have a negative impact on vision and even physical health.

1. The role of teachers has become a simple "network anchor". Because most of the teachers are in the initial contact with online teaching, and the use of the platform is in the exploratory stage, the role of the teacher has become a simple "anchor". Most of the time, the teacher is talking alone and the students are listening. There is a lack of interaction between teachers and students in on-site teaching. Even if the teacher can speak soundly and vividly, the students will feel tired and the teaching effect will be greatly reduced.<br>2. Lack of effective control of students. Because there is no on-the-spot teaching, teachers can not restrain students. If students' self-discipline ability is poor, their attention is not focused when they listen to the class, they play games, listen to music, read novels, send messages, and even leave the classroom midway, which can not be stopped in time. This kind of teaching effect is doomed to be very poor.<br>3. Online teaching classroom learning atmosphere is insufficient. Online teaching teachers can't make inspections in the classroom, can't directly face the learning state of students, and can't carry out on-site question and answer or group discussion. The interaction and communication between teachers and students, students and students are far less effective than on-site teaching. This kind of classroom seems cold and has no warm learning atmosphere in the classroom.<br>4. The teaching effect can not be guaranteed effectively. In the process of online teaching, students are lack of on-site guidance from teachers, and teachers can not find the problems of students in time and give guidance in time, so students are prone to detours. At the same time, the feedback effect after class is poor. Teachers arrange online homework and ask students to submit it in time. However, students' homework is easy to perfunctory, plagiarize and complete the task with the help of question searching software. Such feedback is invalid, and teachers can not find problems and make adjustments through students' homework in time.<br>5. It has great influence on students' eyesight. Online teaching uses computers, mobile phones and other equipment to teach, which poses a threat to students' visual health. Especially for middle and senior students, all subjects are taught online, which means that students have to be in front of computers or mobile phones for at least 6 hours every day, which will have a negative impact on eyesight and even physical health.<br>