any part of the body that could get damaged if hit too hard, or to often shouldnt be allowed..
i use to get hit, it stopped once i started to hit back, and block..ect.. was making me violent (dont see how its meant to teach a lesson)..
but now im not, stay out of trouble and only hit people if its self-defense
if they brought the cane back into school id take it off the teacher if i got hit, and hit him to see how it feels, i dont think hurting someone makes them learn