Kent club rules said, before solo, learn to drive the winch.....
This was changed when it was realised there were broadly three categories of winch drivers.
Naturals, duck to water etcetera.
Diligent pupils with little feel for the art..
And of course those who should never be allowed near anything of such potential mischief!
The winch cab on the courses became a sort of finishing school, where the students could ask questions that might attract the derision of the instructor.... and also gain some understanding of the teamwork of winch launching!
I signed off quite a few winch drivers in my tenure, and also re-educated a few of the older generation who launched everything at 40 kts as though t'were a T21 - a K13 really appreciates a nice 54 kt climb....!!!
Also worthy of note was the whole solo flight idea, get out of the K13 and fly the K8. If a solo pilot bent the K13, nobody could fly.... good reasoning, but it meant I was in demand as driver for all the first solo flights on the wire!!