Well Treppen said 'also up the CBA grades', so taking it at face value then the school is asking them to up LC and JC grades.
But again taking it at face value if the teacher sent them an email advising them to drop level then the teacher is in the wrong, that clearly implies they are being told they would not pass HL.
But the whole notion of the parent finding out the calculated grade, how is that possible?
I wonder was the teacher's identity verified by Joe's researchers?
Not necessarily in this case but a tactic teachers need to be aware of when disclosing any info thinking it's a casual conversation.
Sometimes on rare occasions parents inflate any bit of info to strongarm an outcome. Parent could have been bluffing and started scattergunning everyone with phonecalls until they got information ... Then went onto someone else and said " Mr X told me this... Or Principal Y told me this".
It's a very clever tactic I've seen once or twice, it helps to escalate a gripe very quickly and implicate other people so you get your way.
Like ringing different customer service agents multiple times until you get a bit of info to use for next call. I do this a lot