Wow. I always like to start going in to meeting like this like Columbo. Play dumb, see what it's all about, ask a few questions without trying to sound accusatory. This sounds like a person who will be extremely defensive. But there's always the teeniest tiniest chance that she's calling a meeting to ask your advice or to give you some great news like "we're thinking of bringing in a tutor". Well, maybe not, but I always like to think there might be some hidden bright side.

If you have the time and willingness, I would have a backup plan of homeschooling her math while she's at this school. I agree with whoever said she sounds like a passion killer. And think how stressful it must be to your DD to know that she has 3 or 4 more years of this woman for math? I was a teacher pleaser too, but I was still terrified and unhappy with the strict nuns I had for some classes, and it stressed me out.