I've taught in elementary schools, high schools, and universities, and I've come to really appreciate the practical side of teaching; each teacher influences their students differently, and students studying in different times are influenced differently too.
我在小學、中學、大學都教過書，非常了解教育是實踐的工作，不同老師教出來的學生就是不一樣，甚至不同時期成效都相異。