Joseph:
Here you go again. You paskened, “Apparently the corporal discipline worked on all of you. Tanach states and Shulchan Aruch paskens that corporal discipline must be used on children.”
That is not just a complete misrepresentation, but it is seriously flawed and misleading. There is an oft quoted posuk, which almost every mechanech cites – but does not know the second half of the posuk.
חושך שבטו שונא בנו.
This is loosely translated as spare the rod – spoil the child.
The second half of the posuk reads:
ואוהבו שחרו מוסר.
There needs to be a last resort of discipline to control a child. But discipline does not teach, it controls. Inasmuch as a yeshiva has a mission to educate, the rod has its proper location hanging in a closet, and should not be used very much. The mechanech that believes he can teach by hitting is neither a mechanech, nor is he a suitable role model for תינוקות של בית רבן. He needs a different career. A true mechanech has multiple other tools to use that do not injure, hurt, embarrass, or otherwise have lasting negative effects. If a rebbi cannot produce a listening attentive child, he has failed to succeed, and he needs the negative consequences.
Lastly, the choice of interventions, with full recognition of Shulchan Aruch, is dependent on the outcome. If the result of hitting a talmid, even with justifiable excuse, will result in continued disobedience, including going OTD, then using that method is not chinuch, and is pure unadulterated assault. Shulchan Aruch discusses the sugya of חובל בחבירו. Check that one out.