Well it's good that she's admitted to making such a howler of a mistake, shame she forgot to actually apologise.
Imagine lying and falsely accusing someone of racism because you can't read, and then doubling down and continuing to play the victim.
She runs a school, does a headmistress really not have anything better to do than spend hours on Twitter writing childish tweets like "dear random person I am unblocking you because [stupid argument point]"
She's just a thick attention seeker trying to chase clout and celebrity. Probably only a matter of time before she goes on I'm a Celeb Get Me Out of Here. Shame she's chosen kids as her way of chasing fame and attention, though.
These Twitter fights she constantly gets into certainly ensures her a ready supply of media attention.