This is an easy problem to solve. The girls all need to surround him on the playground and whoop his ass. End of problem. The most direct and effective way to eliminate a bully is to beat them bloody and let them know that any time they so much as twitch out of line the next beating will be worse.

Lather, rinse, repeat.

I was occasionally the target of bullies from about 5th-12th grade. Then I came to the realization that getting hit hurts just as much if you don't fight as it does if you do sight.... so .... I made sure that when I was bullied the bully went home looking just as bad as I looked. An amazing thing began to happen. The bullies started paying me far less attention, my social standing and prospects began increasing, and a couple of those who used to torment me began approaching me in a far more friendly manner.

A couple of times in that period the parents of a bully would drag their bloody and cut up kid to our front door wanting to confront me and my parents. My dad sent them packing with the message that if their kid did not like getting their ass kicked they needed to say the hell away from and quit bullying me.

My teachers and school administrators always had my back because they were well aware of the history and the players involved.

The pinnacle incident was in 8th grade. I was in the court yard outside of the cafeteria after lunch just hanging out along with most of the rest of the school before the class bell rang. Someone ran across the court yard from behind me and jumped on my back which knocked me forward onto my knees and hands which were notably skinned. I immediately stood up to attack the guy (one of my tormentors from elementary school from before I started standing up for myself) and as soon as I stood up his year younger minion did the same thing causing me to again fall to my hands and knees. As I sprung up from the ground the second time I caught him with a full swing punch to the middle of his bottom lip and split his lip in half all the way down to his chin. He had two lip flaps hanging on either side of his very loose teeth and blood was flying everywhere. I landed a second punch which turned what was left of his lower lip into the consistency of ground beef and he staggered backwards. I then went after the first guy who backed up with his hands raised and turned to run.

I was escorted to the Principals office where I received zero punishment. The two of them were suspended. The kid I mangled was the younger brother of a cheerleader. She approached me the next day to share that when her brother got back from the hospital where they put his lip back together he got in a ton of trouble with their dad.

And that... is how I dealt with bullies thereafter. Zero tolerance.... and they left the confrontation in far worse shape than I did. I had a couple of other incidents in HS but nothing to that level of violence or requiring reconstructive medical intervention.

I am sure the teacher is fed up with your Skid. That she called is a good thing. What she needs to do is take a paddle to his ass. Teachers should not have to deal the failed parenting experiments of inept parents.

Your Skid had better catch a clue in a hurry before he meets up with the wrong victim of his bullying who will rip him a new asshole... and deservedly so. Where is your SO in this story? I hear the Skid's involvement, the teacher's involvement, and your involvement... where is Daddy? Whey hasn't he given his spawn clarity?