Cultivation Starts from Being a Teacher

It's also time travel! It's also a system addition! Why Did I get a teacher system? Chinese class! I teach! Not just reading and writing! Math class! I'm coming too! Isn't it just one, two, three, four! Physical education class! Go for free time! ... "Hello, Teacher Lin!" A group of Supreme Lords, Holy Lords, and Demon Lords raised their heads, held notebooks, and listened carefully to the lecture. "Well, it turns out there is such a useful thing as the multiplication table!" "Teacher! The Mathematical Olympiad questions are too difficult! I don't want to learn them!" "Teacher Lin! I still like reading classes!" ... Lin Mu: "Don't call me teacher, I don't deserve it!"