In following the Open Closed Principle, I want to be able to write a class or a method and then turn my back on it, comfortable that it does its job and I won't have to go back and change it.
The "invite user" form submits to /invitation/do_edit/ -- this is the standard "back-end" record creation and editing method that applies the changes and then returns the user backto a sensible page.
It is analyzed in this essay the "feed back correction" in course teaching method, in which "feed back correction" is an efficient way to improve students writing skill and intrigue their interest.