More than 654.38+million videos, including competition classes, excellent classes, open class demonstration classes, observation classes, classroom recording video classes, etc. In all subjects of primary school, junior high school, senior high school and preschool teachers;

You can see everything here (both high-quality classes and lectures)

/user _ playlist/id _ umzq 5 mji 3 mtqw . html

There are classified directories and links in my QQ space log (this is more convenient to learn! )

/983228566/blog/