Valeria Ilva tries peer to peer violence in St. Paul's public schools

Distrust and Disorder: The district also shifted its thinking on discipline, influenced by data that showed black kids being suspended at alarming rates. Such punishment would now come as a last resort. Instead, disruptive or destructive students would essentially receive a 20-minute timeout, receive counseling by a "behavioral coach," then return to class when they calmed down.
The changes came at the behest of Superintendent Valeria Silva. When she took up the torch of St. Paul's schools in 2009, she inherited an urban district like so many others — one with a dire achievement gap between students of color and their white counterparts.
She charged teachers with the job of fixing this gap, lest they be complicit in the cycle of poverty among black and brown communities.
Silva's solution, called Strong Schools, Strong Communities, was touted as "the most revolutionary changes in achievement, alignment, and sustainability seen within SPPS in the last 40 years." At least according to the district's website.
To kick it off, St. Paul spent more than $1 million on Pacific Educational Group, a San Francisco consulting firm that purports to create "racially conscious and socially just" schools.
Pacific offered racial equity training for teachers and staff, where they practiced talking about race. Teachers were asked to explore their biases, to preface their opinions with "As a white man, I believe..." or "As a black woman, I think...."
"The work begins with people looking at themselves and their own beliefs and implicit biases," says Michelle Bierman, the district's director of racial equity. If teachers could recognize their subconscious racism, everyone would work together to bridge the gap.

So, when a kid slugs another, first check to make sure is not racial culture.  Evidently some racial cultures communicate by mouth slugging.