Chalk’s Fourth Law of Teaching:
"No situation is ever resolved to the satisfaction of all parties involved."
Eg. Kid a hits Kid b
A trivial punishment (eg. a day's exclusion so that they can relax at home, secure in the knowledge that no record of this will ever be kept or passed onto a prospective employer) is given to Brat a whose Parent c comes racing up to school (daytime TV permitting) to complain about long history of Wretch b bullying Wretch a
Dreadful Child b is then punished also, perhaps with a detention which they need feel no obligation to attend, followed rapidly by phone call from their Parent d in a rage because of Future Prison Inmate b receiving the same punishment as a when they 'weren’t doing nothing wrong.'
Lying Witnesses e,f,g and h are then interviewed by Head of Year who wearily listens to four conflicting stories and concludes rightly that no sense whatsoever can be made of the whole incident and instructs both parties to be nice to each other in the future. No further action taken.
Next day: Horror b punches Horror a and the next episode of this sorry saga begins.