The teachers may be personally conservative to some extent or other but the books they use and the unions (NEA mainly) they are members of are certainly not!
Remember: most teacher training programs are liberal to the core: God is Dewey. There may be a few crypto conservative teachers out there but not many...not even in the red states.
How many teacher training programs have you been involved in? Mine happens to be rather conservative. I also have met quite a few conservative teachers.
Do you even know any actual, LIVE, teachers?
Most college professors, whether in the education department or otherwise, are liberal.
I am a teacher in a red state. What are YOUR qualifications?