I Need your Guidance

Everyone,
I need your guidance.  Please. 

I have been working on myself to communicate better, to control impulses and learn to realize that most conflict is generally a misunderstanding.

I am working with a group of parents and teachers (I know, this should explain everything right here)
I went into this knowing that most things like this generally have a junior high mentality.
Knowing that, I have been able to disregard the pettiness that goes with this type of group.
But, for the past month, I have had the Teacher (this is sad) causing problems to undermine everything that the group is trying to accomplish.
For the past 4 days, the pettiness has been directed specifically at me and has affected my daughter directly.  I have been festering in anger, and it makes me feel like I should quit to avoid the heartache.  But I'm in this for the girls and especially, my daughter.

Please give me encouragement to move past this and get the teacher on board, rather than belittling the efforts of everyone.
I'm at my witts end and want to let my anger take over.  But in all honesty, I know that is what the teacher wants, but it will not benefit the girls one bit.  And that's why I've been doing this for 8 months now anyway.
In fact, I'm pretty sure I will be in charge again for the next year because no one else wants to deal with the teacher head on with as much patience as I have shown.
Please guide me in what must come in the next days, weeks and months.

Sincerely,
Deborahlynn10