Nearly at the end of another year, my 14th and I still haven't learned anything. Because I'm old and lazy I probably only work part time compared to you young fit instructors. But as in every New Year I'll start with more gaps than pupils because I let them all take their test before Christmas instead of doing what a lot of instructors do and make sure I have work to come back to in the New Year. 
Think when they all pass that will be half of my work gone.