Which platform is better for junior high school online courses?

Beep, Iqiyi, Youku. There are high-quality video resources such as physics master, Lele classroom, mathematics master, chemistry master, biology master and geography master. , can provide a set of teaching videos from senior one to senior three, with comprehensive and detailed knowledge points, which can ensure junior high school students to master all the knowledge of junior high school.

There are also experimental videos, key knowledge explanations, animation, principle explanations, and sharing of key problem-solving ideas, and one-stop service. There are videos related to the history of English political physics, and they are a whole series, ensuring that junior high school students get at least 90 points in the junior high school exam. That's what I saw in the past. I got the top 50 in the school. Personal tests are effective.