The most important ingredient for a good teacher’s preparation, is not what to teach, but what to skip. – Yesfun
As a tutor having over 10 year experience, I have a good communication ability. I am able to understand what the listeners knew, what they want to know, and find the best way to explain the stuff. What they already knew is equally important as what they want to know: one is the starting point; the other is the ending point.