The problem for teachers is this: the number of raging lefties in the urban areas (that get the most press) is huge; so too are the number of raging lefties at the conferences/state board of education/writing the papers/running the teacher's colleges. And, they tend to be most vociferous (conservative and now even moderate teachers tend to not call attention to themselves -- even one or two raging lefties at a school will cause problems for you).