Satoru:	I've been through lessons like this.
Melissa:	Yeah. Some professors are so engrossed in their own thoughts that they forget the world around them.
Liao:	We need a balanced vision: a keen awareness of our audience as well as a clear idea of our instructional target.
Tim:	You make it sound as if teaching were a military exercise. . .
Liao:	In one sense, it is.