re: OT dads, how do you deal with bullying?

Already posted how to handle it online. As far as in person, you can handle a lot with one push.

A quick one-handed strong push gets the kid's attention and puts him in the beta. Look him in the eye and say "do we have a problem?"

If it has gotten bad, use a two handed push instead. When the other boy clearly sees you boy but they haven't spoken. Have him walk right up, while the guy is looking at him, your boy pushes his chest so hard the kid falls on the floor. That's puts him in his place and gives your boy the chance to walk up on him while he's on the ground. No way the other kid gets up to fight.

No one gets suspended, and your kid stood-up from himself.