What is it?
Inversion is a problem solving technique in which you work backwards, not forwards. You think about the end, your goal, and what actions you can take to make sure that goal does not happen. In this way, you are conscious of all the things you can do to not reach your goal, so you are able to NOT do them.
"Avoiding stupidity is easier than seeking brilliance."-- Simon Ramo
"Just tell me where I am going to die, so I never go there."-- Charlie Munger
Think of a goal you have for your students (or teachers). Have the goal in mind? Now, list all the actions you can take that would make sure your students (or teachers) would never reach that goal. Now you know what not to do!