There is not a simple answer. It depends on the subject and level of students,of course.

VOA: special.2009.12.17

Because if the change was not possible on the individual level, ? on the society level,why am I doing what I am doing?

因为如果从个人层面或社会层面来说，改变都是不可能的，那我在这里干什么？

哈佛公开课 - 幸福课课程节选

Trying to understand, not just on the cognitive level of the research, but also to experience on the visceral emotional level, what it really means to give ourselves the permission to be human.

希望你们理解，不只是在研究的认知层面上，还要在内心情感层面上去体会，准许自己为人的真正含义。

哈佛公开课 - 幸福课课程节选

"What I have seen is a lot of kids really take off because they do have the one-on-one attention and they are up to grade level, if not beyond,as a result of having been in the program."

VOA: special.2010.07.16

Well, for the answer to that we have to go back to ancient Greek music theory, and when you read about this--it's really turgid stuff-- but believe it or not, I teach a course on this at the graduate level.

这个,要回答那个问题,恐怕要追溯到古希腊的音乐理论,每次读这些都会云山雾罩的,不管你信不信,我曾在研究生中开过这个课程

耶鲁公开课 - 聆听音乐课程节选