The difference between online courses and offline courses is that one is online, one is in the classroom, one is at home, one is in front of the teacher. For those students with strong self-control ability, the online course is undoubtedly a better way of learning, it is convenient and fast, not limited by time and place, but for those students with medium self-control ability, due to the lack of supervision from teachers, it is likely to have no good learning effect. Because of the outbreak, we also stayed at home for online classes. Because of my poor self-control, I am not in good condition in class. So I think offline teaching is more suitable for me. But I still think the emergence of online courses is the progress of the times. Students can stay at home and learn a lot with only a mobile phone. It's very convenient. They can also choose online courses that suit you and your interest. If we can strengthen self-control, online classroom is a good learning tool, we should make good use of it.