The headmistress was right in what she did...the verbal threat was not a physical attack and can not be deemed as an offense warranting punishment.
If the little guy was bound to get into a fight with he bigger one just for
being, he should have let the big guy throw the first punch and then kicked his a$$. Being a boxer, he should know the techniques for blocking an attack and could have come out of it unscathed.
In spite of the fact that my son's crutches were repeatedly kicked out from underneath him in the seventh grade (he had a broken leg and ankle, a cast up to his hip), he was suspended from school for getting up and knocking her out with one of his crutches.
Chances are that the little guy would have been rusticated for his self defense as well but it is school's policies against physical violence that punishes all involved and there is no separation of reason between attack and self defense.
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You know childhood is over when a puddle seems like an obstacle instead of an opportunity.
Is Too! Is Not! Is Too! Is Not!