I teach because teaching is a profession built on change. When the material is the same, I change — and, more important, my students change.

我教书，是因为教学是建立在“变化”这一基础上的职业。教材还是原来的教材，但我自身却变了——更重要的是，我的学生变了。

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So I had to get the teaching material and teach him myself.

所以我得到的教材和教他自己。

youdao

In fact, a good teacher should know how to use the simplest teaching material to teach well.

事实上一个好的老师应该知道如何用最简单的教学用具上好课。

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