What constitutes good teaching and why do we all have different ideas about what good teaching is?

To put it simply, good teaching is any technique that gets the job done. More precisely, to get the job done one must employ an array of techniques to keep students engaged, active, and aware at all times. This can be difficult to discern from an administrators perspective. A principal may pop in for a few brief visits throughout the year which only provides a glimpse into the teacher's technique and not a full grasp of it. Every classroom is unique. I think of music as an example. There are so many different types of music and yet every type reaches and touches someone. Every teacher makes his own educational "music". If we were all identical, much would be lost in the delivery. Students would drift from one class to another, not connecting with any of the material. I have my own set of experiences, skills, and talents. This drives some of my opinions as to what qualifies as effective teaching.