What does excellence in Teaching look like?

Have you seen these videos? http://videos.tntp.org/video/521  This is suppose to be an excellent video.  It is "whole brain"  which is the mimic back what I teach method.  If you are using the teacher appraisal model and checking off a list you probably checked:

students are involved

teacher gives praise

feedback used to guide lesson.

However do the kids know anything about slope when this lesson is done?  Do they understand the idea that positive slope means y grows as x grows?  Do they understand there is a ratio happening here?  Maybe it is in the next lesson.