Now I've looked at what the school was proposing the mother should hit her child for. Talking too much in class, chewing gum, and bringing toys to school.
Gum chewing makes my jaws ache, personally, and I hate the way it stops tasting of anything after about 10 minutes, but if someone else wants to chew it, then that's their lookout.
But it is very clear why gum chewing and the other things have riled the school so much. It means the boy was not paying enough attention and trying to entertain himself in other ways - by having a conversation and playing with toys. Instead of addressing honestly why toys and friends might be of more interest than whatever activities the teacher was forcing the children to participate in (could it be just possible that the school might be at fault for so blatantly not meeting the needs of its pupils?), a SIX year old is branded as naughty - a label which can follow a child through their entire school career - and the school deems that he should be hit for not being interested in what they have offered him educationally.
Thank G-d homeschooling is an option in that state.