Better online remedial platforms include Youku, Tencent Classroom, Netease Open Class, Netease Cloud Classroom, China University OCW, Tang Xue Online, Bi Li Bi Li, Du Yun Classroom, etc.

The significance of online remedial classes is as follows:

Improve teachers' efficiency: By recording and playing courses, teachers can save time, improve learning efficiency and adjust learning time more flexibly. Personalized learning: Recording and broadcasting courses can meet the needs of students who want to learn anytime and anywhere, and provide more support for students' personalized learning methods and fragmented learning habits.

Skills training and education popularization: Recording and broadcasting courses can train specific skills, such as language learning, programming skills, etc., and at the same time, education popularization can be carried out for different age groups and occupations, such as scientific knowledge and historical knowledge. Improve teaching quality: Recording and broadcasting lessons can make teachers modify and adjust the course content repeatedly, thus improving teaching quality and students' learning effect.

Sharing of teaching resources: recording and broadcasting classes break the limitation of traditional teaching resources and let high-quality teaching resources be shared with more people. Both urban and rural students can enjoy high-quality teaching resources through recording and broadcasting courses as long as they have Internet connection.

Improve teachers' teaching level: Recording and broadcasting courses require teachers to have certain teaching ability and professional knowledge, and at the same time, they also need to master certain recording skills. Through recording and broadcasting lessons, teachers can constantly reflect on their teaching methods and contents, and constantly improve and improve their teaching level.