As for the postgraduate entrance exam online classes, which English teacher, math teacher, and political teacher’s videos can be more rewarding to watch?

The older the teacher, the better. Those teachers in their early thirties will tell you vulgar jokes. Don’t watch them. It’s a waste of time.

English: Zhang Hongbing (strongly recommended, teach you A lot of skills), Zhu Taiqi, don’t watch anything about New Oriental, it’s just deceiving people

Politics: Zhang Junfang, Ren Rufen, Xu Zhiming, etc. Politics is generally not much different, and it is still a class for teachers under 40 years old. Listen

Mathematics: Li Yongle

I hope it will be helpful to you. I also suggest that it would be better to enroll in a political class