Another reason to home school. If anyone needed any other reasons to pull there kids out of public school before they turn into a liberal.
Not really, there are many good teachers (I would hazard to say most) out there. Simply teach your kids how to think for themselves, ask questions of the teacher, and talk to you when they think something is not quite "right". Also be involved and aware of what your kids are doing in the classroom. 
Since both of our wife's are teacher i have to agree with you... My problem is that "good" teachers teach their subject and go less noticed... Some teachers purposely choose material to push the agenda and teach to that. I have had teachers in HS and College that graded much harsher/lenient depending on IF you fell in line with the BS they were trying to push. I have also been to teachers end of year parties and its not hard to figure out who's class i would NOT want my kids attending.
JLS you are correct Parrenting is a Verb and that is important to keep in the front of your mind. While my kids do not have undermining teachers they have had Subs that are... Being a good parrent IS about teaching your child to think...
I don't think its good to put your kids into a situation that directly opposes your values, so if you have that kind of teacher move to a different class room, or find some other solution.
