corporal punishment in schools is illegal in 31 out of 50 states for a reason. It is not at all effective, only cheap and takes less time. Would you rather save time by abusing a child? Or properly teach/“rehabilitate” a child and make them a better person?

Spanking also happens to show more bias than other forms of punishment. In one study, the numbers indicated that boys got punished more often than girls, and “blacks” were punished more often than the rest of the kids.

There was a paddling case in Georgia where a five-year-old boy was abused. On the site, there are many other pieces of evidence. "Some argue that spanking can help drive down a child's IQ or ability to learn. Others say it triggers more aggressiveness. And child welfare advocates warn that corporal punishment — along with harsh but non-physical discipline — is often applied disproportionately to students with disabilities and those who are black, raising the chances that they will fall behind in school."

Corporal punishment will make the school like a violent environment and it is a form of child abuse.

Of course discipline is an important aspect, but some people feel like it is overrated. On a site about self-discipline, it was commented that one doesn’t really need self-discipline as long as they have the right motivation. Studies show that spanking lowers a child’s self-esteem. If a child is spanked constantly, the only proper/instinctive motivation they will have is to not get spanked.

Although it might take less time out of their lessons to give a lecture, studies show that students who are corporally punished in school “perform significantly worse executive functioning”

Yes, I understand your point, but a lecture is quite effective and doesn’t need to cause any kids harm. Also, where spanking a child with a paddle is cheap, a lecture is completely free.