And when I had a moment of forgetfulness my teachers would correct the situation with a ruler to the knuckles--Richard
know what you mean.
in practice lessons our teacher had a chalkboard brush, he would trow it at you when having bad habits.... (yes i had them too

)
you could bring it back and put it on his hand, arm was stretched.
in the other hand he had a 1" thick electric cable.....
you had to be fast putting the brush back, LOL
maybe this was to much, (on the other hand we weren't easy for him)
but now days teachers cant do nothing but say "please"