I remember this happening to my 6th grade class (11-12 yrs). The offense happened the day before while I was absent. It was because all the boys stayed late after lunch playing baseball. In fairness to the boys, the school bell didn’t ring like it always did when it was time to come in.
It was the first order of business the next morning. The bastard tried to include me in the bunch, but I wasn’t going for it. And the girls all backed me up, which was nice.
They all got 2 swats with the board bending over the teachers desk.